What if Deku had a Living Armor (Colossal) quirk that's overpowered

 

The world is not born equal.

 

That was the harsh, unyielding truth that most people learned at some point in their lives. For some, it was a lesson learned in the boardroom, or on a sports field, or in the quiet realization of their own limitations. But in a society where eighty percent of the global population possessed uncanny, supernatural abilities known as Quirks, that lesson was often taught much earlier. It was taught in the vibrant, chaotic, and sometimes cruel environment of the playground.

 

In the bustling metropolis of Musutafu, Japan, the extraordinary had long since become the mundane. Men with the heads of hawks commuted to work on trains; women who could conjure rainstorms from their fingertips watered their gardens with a mere thought. The sky was often streaked with the colorful contrails of Pro Heroes—those licensed individuals who had taken it upon themselves to police a world where anyone could potentially be a walking weapon.

 

For four-year-old Izuku Midoriya, this world was nothing short of a miracle.

 

Izuku lived and breathed heroes. His bedroom was a shrine to the greatest of them all: the Symbol of Peace, All Might. Posters of the smiling, muscular titan plastered every square inch of his walls. Action figures stood in perfectly aligned rows on his shelves, and his computer monitor was practically burned with the image of All Might’s debut video—the one where he saved over a hundred people from a catastrophic disaster with a booming laugh and an unbreakable smile.

 

"Fear not, citizens! Hope has arrived! Because I am here!"

 

Izuku had memorized the cadence, the pitch, the very breath All Might took before delivering those iconic lines. He would sit in his oversized desk chair, rocking back and forth with a beaming smile, holding an action figure aloft as he played the video for the thousandth time. He wanted nothing more than to be just like him. A hero who saved everyone with a fearless smile.

 

But to be a hero, one needed a Quirk.

 

At four years old, Izuku was at the prime age for manifestation. It was the waiting period, the agonizingly slow crawl of time where every morning Izuku woke up and checked to see if he could float, or breathe fire, or move objects with his mind. His mother, Inko, could pull small objects toward her with a gentle telekinetic tug. His father, Hisashi, could breathe fire. Genetically, Izuku was a powder keg waiting for a spark.

 

Yet, weeks turned into months, and nothing happened.

 

Meanwhile, his best friend—and the undisputed king of the neighborhood kids—Katsuki Bakugo, had manifested his Quirk with explosive fanfare. Quite literally.

 

Katsuki’s Quirk, Explosion, allowed him to sweat a nitroglycerin-like substance from his palms and ignite it at will. Even at four years old, the tiny pops and cracks emanating from Katsuki’s hands were dazzling, loud, and inherently powerful. It was a flashy, combat-oriented ability that immediately drew the awe of the adults and the reverent submission of the other children. Katsuki was a prodigy, and he knew it. He carried himself with a swagger that belonged to a seasoned war veteran, not a toddler in shorts and a graphic tee.

 

"I'm gonna be the number one hero!" Katsuki would proclaim, standing atop the jungle gym as if it were the summit of Mount Everest, tiny sparks crackling in his palms. "Even better than All Might!"

 

And Izuku, starry-eyed and completely devoid of malice, would nod enthusiastically from the ground. "You're amazing, Kacchan! Your Quirk is so cool!"

 

Izuku truly believed that. He admired Katsuki. But as the days wore on, the dynamic between them began to shift. The gap in their perceived value widened. Katsuki had a spectacular Quirk; Izuku had none. The other children began to orbit Katsuki like planets around a harsh, burning sun, while Izuku was increasingly relegated to the role of an afterthought. A follower. A spectator in the grand arena of Katsuki’s life.

 

It wasn't that Katsuki outright hated Izuku, but he had begun to look down on him. Without a Quirk, Izuku was fragile. Weak. A pebble on the path to Katsuki’s inevitable greatness. And Katsuki, emboldened by the constant praise from his parents, his teachers, and his peers, had begun to confuse his strength with superiority. He began to believe that those who were weak were meant to be stepped on, to be commanded.

 

This fundamental misunderstanding of power is what led to the incident on that sweltering Tuesday afternoon in the middle of July.

 

 

 

The neighborhood park was a sprawling expanse of emerald green grass, towering oak trees that provided dappled shade, and a large sandbox centered around a colorful, multi-tiered playground structure. The air was thick with the droning symphony of cicadas, a relentless, vibrating hum that seemed to amplify the stifling summer heat. The sun beat down mercilessly, baking the pavement and turning the metal slide into a burning hazard.

 

Izuku sat near the edge of the sandbox, a small red plastic shovel in his hand. He was wearing a plain white t-shirt and green shorts, his messy mop of forest-green hair plastered to his forehead with sweat. He was absentmindedly digging a moat for a lopsided sandcastle, though his large, emerald eyes were fixated on the clearing a few yards away.

 

Katsuki was holding court.

 

Flanked by two of his usual lackeys—a boy with leathery, extending fingers and another with small, nascent bat wings sprouting from his back—Katsuki stood with his chest puffed out, a cruel smirk playing on his lips.

 

Opposite them, backed up against the trunk of a large, ancient oak tree, was another boy. Izuku vaguely recognized him from a different preschool class. The boy was clutching a heavily scuffed All Might action figure to his chest, his knees knocking together, tears streaming down his chubby cheeks. He had a minor transformation Quirk that made patches of his skin sprout hard, jagged crystals, but right now, those crystals looked dull and brittle.

 

"You really thought you could just take that spot?" Katsuki sneered, his high-pitched voice carrying across the quiet park. He took a step forward, smacking his right fist into his left palm. A sharp CRACK echoed out, accompanied by a flash of orange light and the distinct, acrid smell of burnt sugar and ozone. "That's my tree. I declared it the base of the Bakugo Agency yesterday."

 

"I-I didn't know!" the crystalline boy sobbed, shrinking against the bark. "I was just playing with my toy! P-Please, Katsuki, let me go!"

 

"Not until you apologize for being a weakling and getting in my way," Katsuki demanded, stepping closer, the sparks popping more frequently from his hands. It was an intimidation tactic, plain and simple. The other two boys snickered, stepping up beside Katsuki to form an impassable wall.

 

Izuku watched, his small hands tightening around the plastic handle of his shovel. His stomach churned. The sight of the crying boy, cornered and terrified, made something hot and uncomfortable twist in Izuku’s chest. It wasn't right. Heroes didn't make people cry. Heroes saved people who were crying.

 

What would All Might do?

 

The thought flashed through his young mind, bright and undeniable. All Might wouldn't sit in the sandbox. All Might wouldn't look the other way. All Might would step in.

 

But Izuku wasn't All Might. He was just Izuku. Four years old. Quirkless. Small.

 

Before his rational mind could catch up with the sheer lunacy of his intentions, his body was already moving. Izuku dropped the shovel, the red plastic clattering against the concrete border of the sandbox. He scrambled to his feet, his worn red sneakers kicking up little clouds of dust as he sprinted across the grass.

 

"Hey!" Izuku yelled, his voice cracking with a mixture of terror and determination.

 

Katsuki paused, glancing over his shoulder. The cruel smirk faded into a look of genuine confusion, which quickly morphed into a scowl. "Deku? What do you want?"

 

'Deku.' It was a nickname Katsuki had given him recently, an alternate reading of the characters in Izuku's name. It meant 'useless.' It meant someone who couldn't do anything.

 

Izuku skidded to a halt, interposing himself between Katsuki’s gang and the crying boy. He spread his arms out wide, holding them stiffly at his sides to maximize his tiny frame. He was trembling so violently that he felt like his bones might rattle right out of his skin. His breath came in short, panicked gasps, and tears pricked at the corners of his large, green eyes.

 

"K-Kacchan, stop it!" Izuku cried out, his voice shaking just as much as his hands. "Can't you see he's crying? If you keep going... I-I'll stop you myself!"

 

Silence fell over the clearing, save for the incessant buzzing of the cicadas. The crying boy sniffled, looking up at Izuku’s back in awe. The two lackeys blinked, looking between Izuku and Katsuki as if they couldn't quite process the scene before them.

 

Katsuki stared at Izuku, his ruby-red eyes narrowing into dangerous slits. For a moment, there was a profound stillness. Katsuki couldn't comprehend it. How could someone so weak, someone who didn't even have a Quirk, stand up to him? It was an insult. It was a direct challenge to his absolute authority.

 

"You?" Katsuki scoffed, his voice dropping into a dangerous, gravelly tone that belied his young age. "You're gonna stop me? You don't even have a Quirk, Deku. You're just a pebble in my path."

 

"I-It's mean, Kacchan!" Izuku stammered, refusing to lower his arms, even though his knees felt like jelly. "H-Heroes protect people! They don't hurt them!"

 

The invocation of the word 'hero' seemed to be the match that lit the powder keg. Katsuki’s face contorted in rage. "Don't tell me how to be a hero, you Quirkless nobody!"

 

Katsuki lunged forward.

 

Time seemed to slow down for Izuku. He saw the fury in Katsuki's eyes. He saw the right hand drawing back, the sweat glistening on the palm. He heard the sharp intake of breath from the lackeys. He felt the terrifying, paralyzing grip of absolute fear locking his muscles in place. He wanted to run. He wanted to curl up in a ball and hide. But the crying boy was right behind him. If Izuku moved, the boy would take the hit.

 

I have to protect him.

 

It was a desperate, singular thought. A survival instinct fused with an unbreakable core of empathy. As Katsuki’s palm thrust forward, a brilliant, terrifying flash of orange and yellow light erupted from the boy's hand. The explosion was aimed right at Izuku’s chest. The concussive wave of heat and force rushed toward him, promising pain and burns.

 

Izuku squeezed his eyes shut and braced for the agonizing impact.

 

But the impact never came.

 

Instead, deep within the marrow of Izuku Midoriya’s bones, something woke up.

 

It didn't feel like a muscle flexing, or a lung expanding. It felt like a dormant, ancient leviathan opening its eyes at the bottom of a dark ocean. A sudden, massive drain of energy hijacked Izuku’s nervous system, violently ripping through his body's caloric reserves in a microsecond. His stomach cramped painfully, a sudden, ravenous hunger gnawing at his insides, but that sensation was instantly overridden by what was happening to his skin.

 

From the pores of Izuku’s arms, chest, and face, a substance erupted. It was neither liquid nor solid, but a bizarre, terrifying amalgamation of both. It was a deep, iridescent black, like obsidian polished to a mirror shine, yet it moved with the fluidity of mercury.

 

Katsuki’s explosion detonated against Izuku’s chest. But instead of scorching flesh and throwing the small boy backward, the flames washed harmlessly over a suddenly impenetrable surface.

 

CLANG.

 

The sound was deafening, a hollow, metallic ringing that echoed across the park, drowning out the cicadas and making the surrounding trees shudder.

 

Katsuki let out a yelp of pain, stumbling backward and clutching his wrist. It felt as though he had just punched a solid block of reinforced tungsten. He looked up, his red eyes wide with shock, and the breath left his lungs.

 

Izuku was no longer standing there.

 

In his place stood a figure clad head-to-toe in a sleek, biomechanical armor. The armor was breathtaking and terrifying all at once. It was primarily pitch black, with dark, gunmetal gray plating overlapping in intricate, muscular patterns over the chest and limbs. Luminescent, vibrant green lines pulsed along the seams of the armor, glowing with a steady, rhythmic beat, like the blood vessels of some great, mechanical beast. Where Izuku's face should have been, there was a smooth, angular helmet with a vicious-looking, V-shaped visor that glowed with blinding emerald light.

 

The "Knight" form had manifested.

 

Izuku stood frozen within the suit, his eyes wide open in the dark interior of the helmet. He wasn't controlling it; the armor had reacted purely on instinct, wrapping around him like a second skin to shield him from the blast. It was cool against his skin, and strangely, he felt a deep, resonant purr vibrating through the metal—a comforting, low-frequency hum that felt inherently protective. The armor was... alive. A biological extension of his own nervous system, possessing a rudimentary, guard-dog-like sentience.

 

But Izuku was four years old, and he was absolutely terrified.

 

He didn't know what was happening. He just knew that Katsuki had attacked him, that his body felt like it was on fire from the sudden energy drain, and that he was trapped inside a dark, metallic shell. His heart hammered against his ribs, beating a frantic, terrified rhythm.

 

Scared. Danger. Protect.

 

The armor felt his terror. It felt the overwhelming surge of adrenaline and the primal, childish fear of a predator. The rudimentary consciousness of the bio-metal interpreted this spike in emotional distress as a signal that the current defensive measures were insufficient. The threat was still present. The host was still afraid.

 

The armor decided it needed to be bigger.

 

Before anyone could speak, before Katsuki could even process the sudden appearance of the Knight armor, a sickening, terrifying sound ripped through the air. It was the sound of groaning, stretching metal, combined with the wet, tearing sound of rapid biological growth.

 

Izuku screamed inside the helmet as a second, far more violent wave of exhaustion hit him. His body was acting as the core reactor for the Quirk, converting his body's lipids and stamina into pure, monstrous mass at an impossible rate.

 

The sleek, human-sized armor began to expand.

 

It didn't just grow; it erupted. The ground beneath Izuku's feet shattered, chunks of concrete and dirt flying into the air as massive, heavily armored boots slammed down, crushing the sandbox into dust. The trees surrounding the clearing violently snapped backward, blown away by the sheer atmospheric pressure displaced by the rapidly expanding mass.

 

Katsuki fell flat on his back, his jaw unhinged, his eyes tracking upward. Up, up, and up.

 

Ten feet. Twenty feet.

 

The sky above the park was blotted out as a colossal shadow fell over the playground. The heat of the summer sun was instantly replaced by the terrifying, chilling shade of a giant.

 

When the violent expansion finally ceased, the silence that followed was absolute. Even the cicadas had stopped their buzzing.

 

Standing in the center of the playground, completely obliterating the jungle gym beneath one of its massive, spiked sabatons, was a Titan.

 

It stood a staggering thirty feet tall. The sleek, agile design of the Knight armor had morphed into a dreadnought of unimaginable proportion. The plating was immensely thick, overlapping like the scales of a mechanical dragon. Massive, steam-venting exhaust ports lined its broad, mountainous shoulders, hissing as they expelled excess heat into the summer air. The arms were incredibly long and thick, ending in gauntlets with fingers the size of family cars.

 

The glowing green lines that had pulsed on the Knight armor were now roaring rivers of emerald energy, illuminating the darkened park. High above, the angular helmet looked down, its massive V-shaped visor burning with a cold, terrifying light.

 

Inside the nape of the colossus, suspended in a web of glowing, neural-link tendrils, little Izuku Midoriya was weeping softly, completely overwhelmed by the sensory input of being thirty feet tall. He could see through the giant's visor. He could see the tops of the oak trees. He could see a flock of pigeons scattering in terror miles away.

 

And, looking straight down, he could see Katsuki.

 

Katsuki was frozen on the grass, looking no larger than an insect. The arrogant, explosive prodigy was completely paralyzed by a primal, soul-crushing fear. This was not a Quirk. This was a natural disaster. This was a Kaiju that had somehow spawned from the weak, Quirkless Deku.

 

The Colossus shifted its weight. The sound of its plates grinding together was like a train derailing.

 

Katsuki whimpered, scrambling backward on his hands and knees, tears welling up in his ruby eyes. It's going to kill me, his young mind screamed. It's going to crush me!

 

The giant raised one of its massive, heavy arms. The shadow of the gauntlet plunged Katsuki into darkness. The explosive boy squeezed his eyes shut, waiting for the end.

 

But the blow didn't fall.

 

Instead, the giant hand bypassed Katsuki entirely. Moving with surprising, terrifying gentleness, the colossal hand came down behind Izuku's original position. The massive fingers curled inward, forming a protective, impenetrable wall of bio-steel around the crying boy with the crystal Quirk, who had fainted from sheer terror.

 

The Colossus didn't attack. It shielded. Even in the form of a mechanical god of destruction, Izuku Midoriya’s core desire remained unchanged: Protect.

 

Inside the titan, Izuku let out a ragged gasp. The sheer biological toll of manifesting and maintaining thirty feet of hyper-dense bio-metal was astronomical. For a healthy, heavily muscled adult, it would be taxing. For a four-year-old child who had barely eaten half a peanut butter sandwich for lunch, it was lethal.

 

Izuku’s vision swam. The vibrant green light of the neural web began to flicker and dim. His stomach felt as though it were collapsing in on itself, his body cannibalizing its own meager fat reserves to keep the armor stabilized.

 

Tired, Izuku thought, his consciousness slipping away into the dark. So tired...

 

A deep, sorrowful vibration echoed through the cockpit. The armor felt its host shutting down. With its master falling unconscious, the Quirk’s survival instinct pivoted from defense to self-preservation. It could not sustain this form without killing the host.

 

To the absolute bewilderment of Katsuki and the scattering, screaming civilians on the edges of the park, the thirty-foot titan suddenly let out a massive hiss of steam.

 

The impenetrable black armor began to dissolve. It didn't crumble or fall apart; it simply sublimated, turning from solid bio-metal directly into a thick, black vapor that quickly dissipated into the hot summer air. The towering colossus vanished as quickly as it had appeared, leaving behind a massive, cratered footprint where the sandbox used to be.

 

As the vapor cleared, a small, fragile body plummeted toward the ground.

 

Izuku hit the soft grass with a quiet thud, rolling to a stop just a few feet away from Katsuki. The boy was completely unconscious, his face pale and drawn, his chest rising and falling in shallow, erratic breaths.

 

For a long minute, no one moved. Katsuki sat in the grass, his chest heaving, his eyes wide and unblinking as he stared at the motionless form of Izuku Midoriya.

 

Deku, Katsuki thought, his mind struggling to reconcile the weak, crying boy in the grass with the apocalyptic giant that had just blotted out the sun. What... what the hell are you?

 

 Sirens began to wail in the distance.

 

 

 

"Mrs. Midoriya, please, try to remain calm."

 

Inko Midoriya was failing spectacularly at remaining calm. She paced the length of the sterile, white hospital room, her hands wringing together so tightly her knuckles were white. Tears streamed down her plump cheeks, her breath coming in panicked, short gasps.

 

"Calm? How can I be calm, Doctor?" Inko cried, turning to look at the man in the white coat sitting by the monitoring equipment. "The police called me and said my son transformed into a monster and destroyed a park! And now he won't wake up! He looks so thin, he looks like he hasn't eaten in weeks!"

 

It was true. Izuku lay in the hospital bed, hooked up to three separate IV bags pumping heavy saline, glucose, and liquid lipids directly into his bloodstream. His usually round, pinchable cheeks were slightly hollowed, and he looked incredibly frail.

 

The doctor, a tall, pragmatic man with rectangular glasses, sighed softly and adjusted his clipboard. "Mrs. Midoriya, I assure you, your son is stable. His body went through a severe, rapid caloric drain. It's a condition we sometimes see in extreme Transformation or Creation Quirks. The body essentially cannibalizes its own fat and energy reserves to fuel the Quirk's manifestation. Given his age and size, the manifestation of something that massive nearly pushed his body to starvation in a matter of seconds."

 

Inko gasped, rushing to the bedside and gently taking Izuku’s small, limp hand in hers. "My poor baby... But a Quirk? Neither my husband nor I have anything remotely like..." She trailed off, unable to even articulate the reports she had heard. A thirty-foot metal giant? It sounded like something out of a comic book.

 

"Quirks are a fickle thing, Mrs. Midoriya," the doctor explained, pulling up an X-ray on a light board mounted to the wall. He gestured to the image of Izuku’s skeletal structure. "Genetics play a major role, yes, but mutation is always a wild card. When two Quirks combine in an offspring, the resulting ability can sometimes mutate into something entirely distinct from the parent's abilities. We call them 'Singularity Anomalies'."

 

The doctor pointed his pen at the X-ray. All along Izuku’s spine, ribs, and the major bones of his arms and legs, there were tiny, dark nodes clustered together.

 

"These nodes," the doctor continued, his tone shifting into a realm of scientific fascination, "are entirely biological, but they possess a density and molecular structure similar to high-grade steel. They act as localized bio-foundries. When activated, they rapidly produce a highly resilient, bio-metallic substance that excretes through the pores and hardens instantly upon contact with oxygen."

 

Inko stared at the X-ray, horrified. "He... he has metal inside of him?"

 

"He produces it," the doctor corrected gently. "But that's only half of the mutation. The Quirk is a hybrid. It's a combination of a Transformation-type—allowing the body to generate and wear the armor—and a massive Emitter-type gigantification ability. Furthermore..." The doctor paused, looking at Inko with a very serious expression. "When we ran brainwave scans while trying to draw a blood sample... the armor manifested slightly over his arm to block the needle. The armor's brainwave patterns were separate from Izuku's."

 

Inko's eyes widened. "Separate?"

 

"Yes. It appears the Quirk has a baseline sentience. Think of it like a highly protective, symbiotic organism. It is intrinsically tied to his nervous system, meaning he can control it, but it also has its own instinctual drive to protect its host. We've tentatively classified this Quirk under the registry as 'Living Armor,' though given the police reports of its size, 'Sentient Dreadnought' might be more accurate."

 

Inko slumped into the chair beside Izuku’s bed, her mind reeling. Her sweet, gentle, heroic little boy didn't just have a Quirk. He had a weapon of mass destruction living inside his bones, a creature of metal and towering height that fed on his very life force to protect him.

 

"Will he be okay?" she whispered, stroking Izuku’s green curls.

 

"He will survive this incident," the doctor nodded. "But Mrs. Midoriya, I must be blunt. A Quirk of this magnitude is incredibly dangerous. The collateral damage potential is catastrophic. If he loses control of his emotions, the armor will react to his distress and expand. And furthermore, if he attempts to use the massive form without proper physical conditioning, the caloric drain will kill him. He needs to consume an extraordinary amount of food, and as he grows, his physical stamina must be pushed to peak human limits just to survive the activation of his own power."

 

The room fell silent, save for the rhythmic, steady beeping of Izuku’s heart monitor.

 

Inko looked at her son. The boy who just wanted to save people with a smile. The boy who now carried a titan on his shoulders.

 

"We will do whatever it takes," Inko said, her voice trembling but finding a core of maternal steel. "I won't let his dream hurt him. We'll figure this out."

 

 

 

Three days later, Izuku was finally discharged from the hospital.

 

He had spent the majority of his time eating. The doctors had put him on a high-calorie, nutrient-dense diet to replenish the mass he had lost. Izuku was quiet, withdrawn, processing the immense, terrifying truth of what resided inside him.

 

He remembered the darkness. He remembered the feeling of being huge, of looking down at the world, of the crushing fatigue. He remembered the purring vibration of the metal, a sound that he now realized was the armor trying to soothe him.

 

He wasn't Quirkless. He was, by all accounts, immensely powerful.

 

As Inko led him out of the sliding glass doors of the Musutafu General Hospital, the bright afternoon sun made Izuku squint. He wore a baggy yellow sweater and shorts, holding tightly to his mother's hand.

 

Standing by the entrance of the hospital, leaning against a brick pillar with his hands shoved deep into his pockets, was Katsuki Bakugo.

 

Katsuki's mother, Mitsuki, stood a few feet away, holding a 'Get Well' basket, but Katsuki was entirely focused on Izuku.

 

Izuku stopped walking. He looked at Katsuki. The memory of the explosion, the fear, the sudden darkness of the armor—it all rushed back. Izuku shrank behind his mother's leg, expecting Katsuki to yell, or to set off an explosion, or to call him Deku and mock him for ending up in the hospital.

 

But Katsuki didn't yell.

 

The ash-blonde boy pushed himself off the pillar and walked slowly toward Izuku. His red eyes, usually burning with arrogance and explosive fury, were dark, focused, and intensely serious. He stopped a few feet away, looking at the boy he had once considered a pebble.

 

Katsuki had spent the last three days having nightmares about a thirty-foot giant stepping on him. He had spent hours staring at his own palms, popping tiny explosions, realizing for the first time in his young life how small he truly was in the grand scheme of the world.

 

His pride had been shattered, ground into the dirt beneath a massive iron boot. But Katsuki Bakugo was not a boy who stayed broken. If anything, the sheer, unimaginable terror of Izuku’s Quirk had acted as a forge, taking Katsuki’s fragile, childish arrogance and tempering it into a razor-sharp, obsessive drive.

 

He didn't view Izuku as a bug to be squashed anymore. He viewed him as a mountain. And Katsuki intended to climb that mountain and blow the summit to pieces.

 

"Hey," Katsuki said, his voice quiet, devoid of the usual sneer.

 

"H-Hi, Kacchan," Izuku squeaked, peeking out from behind Inko.

 

Katsuki pulled his hands out of his pockets. He pointed a finger directly at Izuku’s face. The gesture was aggressive, but there was no malice in it—only a fierce, burning promise.

 

"You're not a pebble anymore, Deku," Katsuki declared, his voice steady and resolute. "That thing... that giant. It's strong. Stronger than me right now. But don't you dare think you've won."

 

Izuku blinked, confused. "Won? But... I didn't want to fight..."

 

"I'm going to get stronger," Katsuki interrupted, his eyes blazing with a newfound, terrifying competitive fire. "I'm going to train my explosions until they can blast right through that black armor of yours. I'm going to be the Number One Hero, and I'm going to beat you to do it. So you better figure out how to control that monster, Deku. Because if you hold back against me when we get to U.A., I'll kill you."

 

With that dramatic, highly inappropriate declaration for a four-year-old, Katsuki turned on his heel and stomped away toward his mother, his posture rigid with determination.

 

Izuku stood frozen on the sidewalk. He watched his childhood friend march away. The bullying dynamic, the careless cruelty of a boy who thought he was a god among insects, was gone. In its place was something much heavier, much more intense. A rivalry forged in the shadow of a colossus.

 

Izuku slowly lifted his right hand. He stared at his palm, staring at the soft, unblemished skin.

 

He concentrated, just for a second.

 

Beneath the skin, a dark, metallic sheen rippled across his knuckles, like a shadow passing over deep water. He felt it—the cold, hard reality of the bio-metal, waiting just beneath the surface, eagerly awaiting his command. He felt a faint, rumbling hum vibrate up his forearm, a phantom purr of a beast that was ready to protect him at a moment's notice.

 

He wasn't defenseless anymore. He had a power that could rival the greatest heroes in the world, a power that could shield anyone from harm. But it was a power that could just as easily destroy everything he loved if he wasn't careful.

 

He squeezed his hand into a tight fist, the metallic sheen fading back into normal skin.

 

I will control it, Izuku thought, his emerald eyes hardening with a determination that mirrored Katsuki's. I will become strong enough to carry it. And I will use it to save everyone.

 

The Giant of the Playground had vanished, but the legend of the Sentinel had just begun.

 

The barbell groaned under the immense strain, the iron plates clanking together in a harsh, metallic rhythm that echoed through the dimly lit confines of the Midoriya garage.

 

Three hundred and eighty.

 

Izuku Midoriya exhaled, a sharp, hissing sound through gritted teeth, as he pushed the bar upward. The muscles in his chest, shoulders, and arms bunched and striated beneath his sweat-drenched tank top.

 

Three hundred and eighty-one.

 

He lowered the bar slowly, controlling the descent with agonizing precision. He could feel the burn spreading through his pectoral muscles, a familiar, welcome fire that told him the muscle fibers were tearing, ready to be rebuilt stronger, denser, better.

 

Three hundred and eighty-two.

 

At fourteen years old, Izuku did not look like a typical middle school student. While his peers were navigating the awkward, lanky phases of puberty, Izuku had transformed himself into a biological fortress. He was five foot nine, but broad-shouldered and thick with dense, functional muscle. His neck was thick, his jawline sharpened by years of zero-body-fat conditioning, and his forearms were corded with veins that pulsed with every rep.

 

He didn't train for vanity. He didn't train for sports. He trained for survival.

 

Ten years had passed since the incident at the playground. Ten years since the "Sentient Dreadnought" had first reared its colossal, terrifying head. In that decade, Izuku had learned the harsh, unforgiving mathematics of his Quirk.

 

The bio-metal that lived inside his bones was not magic. It obeyed the laws of thermodynamics, specifically the conservation of mass and energy. To create the hyper-dense armor that coated his body in its "Knight" form, his body had to convert internal calories—lipids, carbohydrates, proteins—into the complex, biomechanical material at a staggering rate. To summon the "Colossal" form, that terrifying thirty-to-sixty-foot titan of destruction, the caloric toll was apocalyptic.

 

When he was six, he had sneezed, accidentally triggering a partial Colossal manifestation of his left arm. It had drained him so completely he had been in a minor coma for two days.

 

The doctors had been crystal clear: if Izuku wanted to live to see adulthood, let alone become a Pro Hero, his body needed to be an engine capable of burning rocket fuel. He needed to be physically unstoppable even without the armor, possessing a cardiovascular system and muscle density that could withstand the violent energy drain of the Quirk's activation.

 

Three hundred and eighty-three.

 

Izuku racked the heavy barbell on the bench press stand. The steel supports shrieked slightly under the six hundred pounds of weight. Izuku sat up, wiping a towel across his forehead, and reached for the massive, three-liter jug resting on the floor.

 

It was a custom calorie shake his mother Inko lovingly, if somewhat exhaustedly, prepared for him every morning. It contained a nauseating blend of whey protein, heavy cream, peanut butter, mass-gainer powder, melted ice cream, and raw eggs. It was roughly four thousand calories. It was his second of the day. He tipped it back and drank deeply, forcing the thick sludge down his throat with practiced indifference.

 

As the cold liquid hit his stomach, a warm, resonant vibration hummed beneath his skin. It felt like a massive cat purring deep within his chest cavity.

 

Happy, the sensation seemed to convey. Fuel.

 

"Yeah, yeah, enjoy it, big guy," Izuku muttered, tapping his chest right over his heart.

 

The armor—which Izuku affectionately, if somewhat warily, called 'Aegis'—was always awake. It was a secondary consciousness, a symbiotic passenger woven into his nervous system. It didn't speak in words, but in emotions, impulses, and vibrations. It was deeply protective, fiercely loyal, and possessed the intelligence of a highly trained, slightly aggressive guard dog. Over the years, Izuku had learned to communicate with it, to soothe it when it felt threatened, and to command it when necessary.

 

It was a delicate balance. Aegis wanted to protect its host at all costs. If someone startled Izuku, the armor's instinct was to manifest and crush the threat. Izuku had spent years mastering Zen meditation, emotional regulation, and deep-breathing exercises just to keep a leash on his own Quirk. A panic attack wouldn't just result in hyperventilation; it would result in a sixty-foot mechanical kaiju leveling a city block.

 

He finished the shake, grabbed his uniform jacket, and headed inside to shower. Today was the last week of his third year at Aldera Junior High. The UA High School Entrance Exams were only ten months away. The proving ground was approaching.

 

The atmosphere in Class 3-A at Aldera Junior High was always a unique ecosystem, largely defined by the presence of two apex predators.

 

Izuku sat quietly at his desk near the back, his broad frame making the standard-issue wooden chair look comical. He was taking meticulously neat notes in his hero analysis notebook, his thick fingers wielding the pencil with surprising delicacy.

 

At the front of the class, leaning back in his chair with his feet propped up on the desk, was Katsuki Bakugo.

 

Katsuki had grown into a fierce, sharp-featured teenager. His explosive Quirk had only grown more potent with age, and his personality had sharpened into a jagged, relentless edge. But the dynamic between him and Izuku was entirely different from what anyone might expect.

 

There was no bullying. Katsuki didn't mock Izuku, didn't call him useless, didn't steal his notebooks. To bully someone implies a perceived superiority. Katsuki knew, deep in his marrow, that he was not inherently superior to Izuku Midoriya.

 

Instead, their relationship was a high-tension wire, vibrating with an intense, almost suffocating rivalry. Katsuki treated Izuku as a measuring stick. If Katsuki couldn't beat Izuku, he couldn't be the Number One Hero. It was that simple.

 

"Since you're all third years, it's time to start thinking seriously about your futures!" the homeroom teacher announced, slapping a stack of career aptitude test papers on his podium. He paused, a smirk crossing his face. "But I know you all want to go to the hero course!"

 

He tossed the papers into the air. The classroom erupted into cheers, with students showing off their Quirks—stretching fingers, small fires, glowing eyes.

 

"Yes, yes, you all have wonderful Quirks," the teacher chuckled, though his eyes drifted to the two boys who weren't cheering. "But no using them in school, remember! Actually... Bakugo, you're aiming for UA High, aren't you?"

 

The class fell silent. UA was the national tier. It had an acceptance rate of less than two percent.

 

Katsuki scoffed, kicking his feet off the desk and standing up. He smirked, sparks crackling harmlessly but loudly from his palms. "Don't lump me in with these background characters. I've aced all the mock tests. I'm the only one here who has the right stuff to go to UA. I'll surpass All Might and become the top hero in the world!"

 

The class murmured in a mix of awe and annoyance, used to his bravado.

 

"Oh, right," the teacher adjusted his glasses, looking at a sheet of paper. "Midoriya, you're also applying for UA, correct?"

 

Every head in the room swiveled to the back.

 

Izuku didn't look up from his notebook. He calmly finished writing a sentence, placed his pencil down, and met the teacher's gaze. "Yes, sir."

 

The classroom remained dead silent. Nobody laughed. Nobody mocked him.

 

Ten years ago, they might have. But no one in Aldera Junior High was foolish enough to mock Izuku Midoriya. The sheer physical presence of the boy was intimidating enough, but rumors of his Quirk—the 'Metal Monster'—had circulated for years. Most had never seen it, but everyone knew he had it. He exuded a quiet, heavy gravity that demanded respect.

 

Katsuki, however, turned slowly. His red eyes locked onto Izuku, a predatory grin spreading across his face.

 

"Deku," Katsuki said, his voice cutting through the silence like a knife.

 

Izuku sighed softly, closing his notebook. "Yes, Kacchan?"

 

"Ten months," Katsuki said, holding up his hands, smoke rising from his palms. "Ten months until the exam. I've tweaked my armor-piercing blasts. My explosions are burning hotter than ever. Don't think you can just stand there and tank me anymore."

 

Izuku met Katsuki’s intense gaze with cool, calm emerald eyes. "I never underestimate you, Kacchan. Your output is incredible. But you still telegraph your right hook when you overcharge your palms."

 

Katsuki's eye twitched. The calm, analytical dissection infuriated him more than any insult could. "I'll blow that smug look off your face, along with that black tin-can you hide in!"

 

Katsuki lunged. It wasn't a full attack, just a sudden, aggressive burst of speed designed to test Izuku's reflexes, his right hand swiping across Izuku's desk with a minor, concussive pop intended to scorch the notebook.

 

Izuku didn't flinch. He didn't even stand up.

 

His left hand shot out with blinding speed. In the fraction of a second it took for his arm to travel, a dark, liquid-like substance seeped from the pores of his forearm and hand, hardening instantly. The sleek, pitch-black, bio-metallic gauntlet of the 'Knight' form encased his hand and forearm, glowing green circuitry flaring to life along the metal seams.

 

Izuku caught Katsuki’s wrist mid-swing.

 

CLANG.

 

The sound of metal meeting bone and explosion echoed sharply in the quiet room. Katsuki’s explosion detonated directly against Izuku's armored palm. The blast was completely smothered, the heat and force absorbed and dissipated by the hyper-dense bio-metal without leaving so much as a scorch mark.

 

Izuku sat perfectly still, his armored grip on Katsuki's wrist unyielding, like a vice grip made of titanium.

 

A low, vibrating rumble filled the room. It was coming from Izuku’s armored arm. The armor was growling at Katsuki, sensing his aggression.

 

"Down, Aegis," Izuku murmured softly, an absolute command in his tone. The growling subsided into a low hum, though the green lights on the gauntlet pulsed aggressively.

 

Izuku looked up at a fiercely scowling Katsuki. "Property damage, Kacchan. The teacher is right there."

 

Katsuki yanked his arm back. Izuku let it go smoothly, the black metal immediately dissolving into vapor and fading away, revealing his unblemished skin once more.

 

"Tch. Whatever," Katsuki spat, though his eyes lingered on Izuku's hand, mentally calculating the density and reaction time. "Save it for the exam, Deku."

 

"I plan to," Izuku replied calmly, packing his bag.

 

The teacher cleared his throat nervously, wiping sweat from his brow. "Right. Well. Let's return to the lesson."

 

The walk home was Izuku’s favorite time of the day. It was a chance to decompress, to let the tight, coiled spring of his constant self-control unwind just a fraction. He took the long route, a path that led through an older, quieter commercial district that passed under a massive, concrete railway bridge.

 

The afternoon sun cast long, golden shadows across the pavement. Izuku walked with a heavy, measured tread, his mind wandering to his hero analysis notebooks.

 

He was incredibly strong, yes. His Knight armor, when fully manifested, granted him superhuman agility, near-invulnerability to blunt force and heat, and enhanced striking power. But it was entirely a close-combat Quirk. He had no ranged attacks. He had to close the distance.

 

And then there was the Colossal form.

 

Izuku shuddered slightly. He hated the Colossal form. He hadn't used a full-body manifestation of it since he was four years old. He had spent years practicing 'partial' manifestations—summoning just a giant arm, or a giant foot—but even those were devastating. A single fifty-foot arm weighed several tons. The displacement of air when it moved created gale-force winds. If he punched a villain with it, he wouldn't just knock them out; he would turn them into a red mist.

 

I have to be a hero who restrains himself, Izuku thought, looking down at his large, calloused hands. Other heroes have to push past their limits to win. I have to pull my punches to avoid leveling the city. If I ever lose control...

 

His thoughts were violently interrupted by a sound.

 

It was a wet, squelching noise, followed by the metallic clatter of a manhole cover being thrown aside.

 

Izuku stopped dead in his tracks. He was directly under the wide, shadowed underpass of the railway bridge. The air grew suddenly cold, and a foul, putrid stench washed over him—a smell like rotting garbage, raw sewage, and stagnant swamp water.

 

Threat, a sensation buzzed at the base of his skull. Aegis was waking up, the phantom purr shifting into a low, agitated vibration.

 

Izuku turned around slowly.

 

Rising from the open sewer grate was a monstrous amalgamation of dark green, viscous sludge. It had no solid form, just a writhing, bubbling mass of liquid filth. Two massive, bulbous yellow eyes floated near the top of the mass, along with a jagged, cavernous mouth filled with crooked, uneven teeth.

 

"Well, well, well," the Sludge Villain gurgled, its voice wet and distorted. "A medium-sized meat shield! You look like a sturdy one, kid. Lots of muscle. Perfect for me to hide in until the heat dies down."

 

Izuku’s eyes narrowed. His heart rate remained remarkably steady. He didn't panic. Panic was the enemy of control. He dropped his yellow backpack to the pavement.

 

"A villain," Izuku stated flatly. He planted his feet, shifting into a standard martial arts stance he had drilled ten thousand times in the dojo. "Stand down. A Pro Hero is likely already tracking you."

 

"Track this, kid!" the villain roared.

 

The sludge mass surged forward with shocking speed. A thick, whip-like tendril of liquid muck shot out, wrapping tightly around Izuku’s ankle and yanking his leg out from under him.

 

Izuku hit the concrete hard, but before he could roll, the massive wave of sludge crashed down on top of him. The villain didn't want to beat him; it wanted to possess him. The sludge forced its way into Izuku's mouth and nose, violently attempting to invade his respiratory system.

 

"Don't struggle!" the villain laughed, the sound bubbling around Izuku's ears. "It'll only hurt for about forty-five seconds! Then I'll take the wheel!"

 

The physical sensation was horrifying. The sludge was thick, suffocating, and tasted like death. Izuku couldn't breathe. His lungs seized, desperate for oxygen that was being denied.

 

And in that moment of physical violation and suffocation, Aegis snapped.

 

Izuku didn't have to summon his Quirk. The symbiotic armor recognized a lethal, existential threat to its host. The host was being invaded. The host was dying.

 

KILL. PROTECT. ELIMINATE.

 

The psychic scream from the armor echoed in Izuku's mind, a deafening roar of absolute, unbridled fury.

 

From the depths of his bones, the bio-metal erupted. It didn't seep slowly this time; it exploded outward in a violent, jagged burst. The pitch-black, hyper-dense material instantly coated Izuku's skin, forming the impenetrable Knight armor. The glowing V-shaped visor flared to life with blinding, emerald intensity.

 

But it didn't stop at the skin.

 

As the villain tried to force sludge down Izuku's throat, the armor formed inside his mouth, a smooth metallic plating sealing his trachea and esophagus perfectly. The armor didn't need to breathe; it sustained Izuku entirely through internal bio-chemical synthesis while manifested.

 

The Sludge Villain recoiled, a wet scream of confusion and pain tearing from its maw as its internal tendrils were suddenly shoved out by expanding, razor-sharp metallic plating.

 

"What the hell?!" the villain shrieked, peeling back to look at its victim.

 

Where a vulnerable, suffocating teenager had been a second ago, a demonic-looking, biomechanical knight now stood. The armor was completely impervious to the sludge. The liquid slid off the hyper-polished black plating without leaving a trace. The green lights on the armor were pulsing frantically, a visual representation of Aegis's blinding rage.

 

Izuku stood up, the metal joints of his armor hissing softly. He was safe from suffocating, but he was trapped. The villain was entirely liquid. Physical strikes from his human-sized Knight form would simply pass through the sludge, doing no lasting damage. He needed a way to disperse the liquid entirely.

 

He needed blunt force displacement on a massive scale.

 

I need a big hit, Izuku thought, asserting his dominance over the raging armor. Focus the mass. Just the right arm. Nothing else.

 

The Sludge Villain, realizing its hijacking attempt had failed spectacularly, reformed its mass into towering, jagged spikes. "I don't know what kind of freak Quirk you have, kid, but you're still just one guy! I'll crush that tin can into scrap!"

 

The villain lunged, a tidal wave of heavy sludge bearing down on Izuku.

 

Izuku drew his right arm back. He took a deep breath, steeling himself for the agonizing caloric drain.

 

"Aegis," Izuku's voice boomed from the helmet, synthesized into a deep, mechanical baritone that rattled the concrete. "Colossal. Right arm only. Maximum density."

 

The response was instantaneous.

 

The black armor on Izuku’s right shoulder, bicep, and forearm began to violently expand. The metal groaned and shrieked, the green luminescent lines widening into blazing rivers of light. In the span of a single second, the arm grew exponentially.

 

Five feet. Ten feet. Twenty feet.

 

The sheer weight of the expanding arm caused the concrete beneath Izuku to spider-web and crack. The limb was monstrous, a gargantuan amalgamation of thick, interlocking plates and steam-venting exhaust ports. It was the arm of a sixty-foot titan, anchored to the body of a teenager.

 

The Sludge Villain halted its charge, its bulbous yellow eyes shrinking to pinpricks of absolute terror as the massive shadow of the gauntlet enveloped the entire underpass.

 

"Wait—what the—!"

 

Izuku didn't give it time to finish. He threw the punch.

 

The biomechanics of swinging a twenty-foot, multi-ton arm were impossible for a normal human, but the Quirk compensated, generating massive kinetic thrusters at the elbow joint.

 

SMASH.

 

The colossal gauntlet didn't just hit the Sludge Villain; it annihilated the very space the villain occupied.

 

The impact was cataclysmic. The sheer atmospheric pressure displaced by the punch created a localized shockwave. A devastating gale of wind exploded outward, tearing through the underpass. The Sludge Villain didn't even have time to scream. The immense blunt force hit the liquid mass and instantly vaporized the moisture, violently splattering the villain into a million tiny, microscopic droplets of sludge that were plastered against the walls and ceiling of the tunnel.

 

The wind pressure blew out the streetlamps on the far side of the tunnel, rattling the chain-link fences and sending a cyclone of dust and debris hundreds of feet into the air.

 

Izuku stood at the epicenter, panting heavily inside his helmet.

 

Disengage, he commanded instantly.

 

The colossal arm sublimated into black vapor, rapidly shrinking down until Izuku was back in his normal clothes, his Quirk entirely deactivated.

 

He fell to his knees, clutching his stomach. A wave of profound nausea and exhaustion washed over him. His body was screaming for food. He had just burned through roughly five thousand calories in a single, three-second maneuver. His muscles ached, his head pounded, and he felt a cold sweat breaking out across his forehead.

 

He looked up, gasping for air. The underpass was completely silent. The Sludge Villain was defeated, scattered across the concrete in harmless, unmoving puddles.

 

"That... was too much power," Izuku wheezed, digging into his pocket and pulling out a highly concentrated, calorie-dense protein bar. He tore the wrapper off with his teeth and practically swallowed it whole, desperate to stave off the crash. "I need... better control."

 

"I WOULD SAY YOUR CONTROL IS QUITE SPECTACULAR, YOUNG MAN!"

 

The voice hit Izuku like a physical blow. It was loud, booming, and resonated with an energy that could light up a city grid.

 

Izuku’s head snapped up.

 

Standing at the entrance of the tunnel, silhouetted by the afternoon sun, was a figure of absolute legend. He stood seven feet tall, practically bursting out of a casual white t-shirt and cargo pants. His muscles were so massive they looked carved from granite. Two iconic tufts of blonde hair stood up on his head like rabbit ears, framing a face that bore a shadow-obscured, impossibly wide, and brilliant smile.

 

It was him.

 

The Symbol of Peace. The Number One Hero.

 

All Might.

 

Izuku’s jaw hit the floor. The exhaustion momentarily vanished, replaced by an overwhelming surge of fanboy adrenaline. "A-A-All Might?! What are you doing here?!"

 

"HAHAHA! I WAS IN THE NEIGHBORHOOD!" All Might boomed, marching into the tunnel. In one hand, he carried two large, empty plastic soda bottles. "I WAS PURSUING THIS SLIPPERY FIEND, BUT HE ELUDED ME IN THE SEWERS! I CAME UP HERE TO CUT HIM OFF, ONLY TO FIND..."

 

All Might paused, his piercing blue eyes scanning the devastated tunnel. He looked at the cracked concrete, the shattered streetlamps, and the splattered remains of the villain. Finally, his gaze settled on the heavily muscled, sweating teenager on his knees.

 

The ever-present smile on All Might's face softened into an expression of profound shock and genuine awe.

 

Toshinori Yagi, the man behind the persona of All Might, was currently searching for a successor. His time was running out, a secret injury slowly whittling away his power. He needed someone to inherit One For All. He had been looking for a diamond in the rough, someone with a heroic heart.

 

He had just witnessed a boy, no older than fourteen, get ambushed by a deadly villain, protect himself flawlessly, and then unleash a localized natural disaster with pinpoint accuracy to neutralize the threat without killing the villain.

 

That boy's Quirk... All Might thought, his mind racing. The sheer kinetic output of that single punch... it rivaled one of my Smashes. And the way his body is built... he's a physical marvel.

 

"Y-You were chasing him?" Izuku stammered, frantically trying to stand up, though his legs wobbled. "I-I'm so sorry! I didn't mean to steal your collar! He attacked me, and I couldn't use my normal strikes, so I had to use a partial manifestation of my gigantification to create a blunt-force shockwave!"

 

Izuku clamped a hand over his mouth. He was muttering. He was rambling in front of his idol.

 

All Might laughed, a hearty, booming sound. He stepped forward and placed a massive, comforting hand on Izuku's shoulder.

 

"APOLOGIZE? MY BOY, YOU HAVE NOTHING TO APOLOGIZE FOR!" All Might declared. He knelt down, rapidly scooping up the splattered sludge into the empty soda bottles with blinding speed. "YOU ACTED IN SELF-DEFENSE, AND YOU DID SO WITH INCREDIBLE PRECISION! THAT WAS A MAGNIFICENT DISPLAY OF POWER AND RESTRAINT!"

 

"Restraint?" Izuku blinked, looking at the cracked pavement. "I nearly blew away the tunnel."

 

"BUT YOU DIDN'T," All Might countered, standing back up and capping the bottles. "YOU AIMED YOUR STRIKE PERFECTLY TO DISPERSE THE VILLAIN WITHOUT COMPROMISING THE STRUCTURAL INTEGRITY OF THE BRIDGE ABOVE US. YOU CALCULATED THE WIND PRESSURE."

 

Izuku stared at him. "How... how did you know I did that?"

 

"BECAUSE IT IS EXACTLY WHAT I DO EVERY DAY," All Might smiled gently, dropping the booming persona for just a fraction of a second. "When you possess power that can alter the landscape, true heroism isn't about unleashing it. It's about holding it back. It's about finding the exact measure of force needed to save the day without destroying the world you're trying to protect."

 

The words struck Izuku like a lightning bolt. It was exactly what he had been struggling with. It was the core philosophy he had been trying to master for ten years, to hear it validated by the greatest hero in the world was overwhelming.

 

Tears pricked at the corners of Izuku's eyes. He scrubbed at them furiously. "Thank you. That... that means everything to me. I want to be a hero like you. One who saves everyone, no matter what."

 

All Might looked at the boy. He saw the fire in the kid's emerald eyes. He saw the thick, scarred callouses on his hands—the undeniable proof of relentless, agonizing hard work.

 

Toshinori considered, for a brief moment, the idea of One For All. This boy had the heart. He certainly had the vessel. But as he looked at Izuku, Toshinori realized something profound.

 

This boy didn't need One For All.

 

To give a Quirk like One For All to a child who already possessed a bio-metallic titan inside him would be akin to throwing a lit match into a nuclear reactor. It wasn't just unnecessary; it would likely destroy him. No, this boy was already destined for greatness on his own terms. He was a force of nature in his own right.

 

But a force of nature still needed guidance.

 

All Might reached into one of the many pockets of his cargo pants. He pulled out a sleek, heavily armored business card. He handed it to Izuku.

 

"YOUR NAME, YOUNG MAN?" All Might asked.

 

"Izuku. Izuku Midoriya."

 

"MIDORIYA, MY BOY!" All Might boomed, giving him a thumbs-up. "YOU HAVE A POWER THAT WILL SHAKE THE HEAVENS! BUT MORE IMPORTANTLY, YOU HAVE THE HEART TO HOLD IT STEADY. I EXPECT TO SEE YOU AT U.A. HIGH SCHOOL NEXT YEAR!"

 

Izuku looked down at the card. It had All Might's personal agency number on it, along with a direct email address. It wasn't just an autograph; it was an invitation.

 

"I won't let you down, All Might!" Izuku bowed so deeply his forehead nearly scraped his knees.

 

"I KNOW YOU WON'T!"

 

With a mighty leap, the shockwave of which nearly knocked Izuku over again, All Might launched himself into the sky, disappearing into the clouds, the bottles of sludge safely secured in his pockets.

 

Izuku stood alone under the bridge, the silence rushing back in to fill the void left by the Number One Hero. He looked at the card in his hand, the embossed gold lettering catching the fading sunlight.

 

He had done it. He had controlled Aegis. He had defeated a villain. And he had been acknowledged by his ultimate idol.

 

A deep, contented purr resonated in his chest. Aegis was satisfied. The threat was gone, the host was safe, and the chemical rush of happiness in Izuku's brain was a welcome sensation.

 

"Yeah, we did good, buddy," Izuku whispered, placing the card carefully into his wallet. He picked up his yellow backpack and slung it over his broad shoulders.

 

Ten months until the UA Entrance Exam.

 

Izuku walked out from under the bridge, stepping into the golden light of the late afternoon. He wasn't just preparing to take a test. He was preparing to unleash the Beast on the world, not as a monster, but as a hero.

 

The path to UA was clear, and Izuku Midoriya was ready to walk it. And if anyone stood in his way, they would have to move a mountain.

 

The morning of the U.A. Entrance Exam began not with the ringing of an alarm clock, but with the familiar, heavy scent of sizzling bacon, eggs, and an ungodly amount of carbohydrates.

 

At 4:30 AM, the Midoriya household was already operating at maximum capacity. Izuku sat at the small kitchen table, clad in a plain gray tracksuit that stretched tightly across his broad, heavily muscled shoulders. Before him sat a breakfast spread that would have made a competitive eater weep. There were three large bowls of rice, a dozen scrambled eggs, a platter of grilled salmon, half a loaf of thick-cut toast soaked in butter, and a blender pitcher filled with his mother’s infamous, four-thousand-calorie protein sludge.

 

He ate methodically, a machine stoking its own furnace.

 

Ten months of hellish, unyielding training had brought him to this day. Following his encounter with All Might under the bridge, Izuku had pushed his body past the limits of human endurance. He had dragged rusted cars across the Dagobah Municipal Beach, not just to clean it, but to force his cardiovascular system to adapt to extreme oxygen deprivation and muscle fatigue. If his Quirk, Aegis, was a hyper-car, Izuku’s body was the engine block. It had to be forged of absolute iron, or it would crack under the horsepower.

 

Inko Midoriya stood by the stove, flipping another batch of pancakes. She looked at her son, her eyes softening with a mixture of overwhelming pride and deep-seated maternal terror.

 

"You're eating too fast, Izuku. You'll give yourself a stomachache," she scolded gently, placing a towering stack of pancakes next to his empty rice bowls.

 

"M'fine, Mom," Izuku mumbled through a mouthful of food, swallowing heavily before washing it down with a massive gulp of the sludge. "I need the reserves. If I have to use even a partial manifestation today, I can't afford to burn out in the middle of the practical exam. They score based on accumulated points. Stamina is everything."

 

Deep within his chest cavity, right behind his sternum, a low, resonant vibration hummed. It felt like the rumbling of a heavy diesel engine idling. Aegis was awake. The sentient bio-metal could sense the influx of massive calories, and it could feel the spike of adrenaline and nervous anticipation coursing through Izuku’s veins.

 

Ready. Eager. Fight.

 

The simplistic, emotional impulses of the armor washed over Izuku’s mind.

 

"Easy, Aegis," Izuku murmured softly, tapping his chest. "We don't go loud today unless we absolutely have to. Stick to the Knight form. Fast, dense, and clean."

 

The hum shifted in pitch, taking on a slightly begrudging, sulky vibration before settling down into a steady purr.

 

By 7:00 AM, Izuku was standing before the towering, glass-and-steel gates of U.A. High School. The sheer scale of the architecture was staggering, a monument to the gods of the modern age—the Pro Heroes. The main building was shaped like a massive 'H', casting a long, imposing shadow over the courtyard.

 

Izuku took a deep breath of the crisp morning air, adjusting the straps of his backpack.

 

"Out of my way, Deku."

 

The voice was a low, aggressive rasp. Izuku didn't flinch. He merely shifted his broad shoulders to the side, allowing Katsuki Bakugo to stride past him. Katsuki was wearing his middle school uniform, but his posture was completely transformed from the arrogant slouch of their childhood. He walked like a coiled spring, his hands shoved deep into his pockets, his crimson eyes fixed dead ahead.

 

"Good morning, Kacchan," Izuku said calmly.

 

Katsuki paused, glancing over his shoulder. His eyes flicked up and down Izuku’s imposing physique. "I'm going to set the high score today. If you're not second place, I'll be pissed. Don't hold back."

 

"I'll do my best," Izuku replied evenly.

 

Katsuki grunted, turning back and marching toward the auditorium. The rivalry was a silent fire that burned between them, a mutual understanding that words were no longer necessary. Only action mattered.

 

Izuku resumed his walk, his mind visualizing the different armor configurations he had practiced. He was so deep in thought that he didn't notice the uneven paving stone jutting out of the concrete path.

 

His oversized sneaker caught the edge. Izuku’s massive frame pitched forward.

 

Before he could even register the fall, Aegis reacted. It wasn't a full manifestation; it was a micro-reflex. A patch of sleek, black bio-metal instantly flared out from his palms, anticipating the impact with the ground.

 

But the impact never came.

 

Instead, a sudden, weightless sensation washed over him. Izuku floated in mid-air, entirely suspended, his metal-plated hands hovering an inch above the concrete.

 

"Are you okay?"

 

Izuku blinked, looking to his side. Standing there, holding her hands out with an apologetic smile, was a girl with round, rosy cheeks and a short bob of chestnut hair.

 

"I used my Quirk on you," the girl said, clasping her hands together. Instantly, gravity reasserted its hold on Izuku, and his feet planted firmly back on the ground. "Sorry for doing it without asking! But it'd be bad luck if you fell right before the exam, right?"

 

Izuku stood up straight, towering over the girl. He felt the patch of armor on his palms sublimating back into his skin as vapor, the threat neutralized. Aegis let out a confused, inquisitive little hum in his chest, intrigued by the sudden lack of gravity.

 

"I... thank you," Izuku said, dipping his head respectfully. He wasn't the stuttering, anxious mess he might have been in another life. The discipline required to tame a colossal beast had bred a quiet, stoic confidence in him. "That's a very powerful tactile telekinesis. Or is it localized gravity manipulation?"

 

The girl’s eyes widened slightly, caught off guard by his deep voice and analytical response. "O-Oh! It's Zero Gravity! I take away the weight of whatever I touch."

 

"Incredible utility," Izuku noted, giving her a small, genuine smile. "I'm Izuku Midoriya."

 

"Ochako Uraraka!" she beamed, her initial intimidation fading. "Well, I better get inside! Good luck, Midoriya!"

 

As she jogged away, Izuku watched her go, committing her Quirk mechanics to memory. A hero who could negate weight. It was a fascinating concept. He turned his gaze back to the massive doors of the auditorium. It was time.

 

 

 

The written exam was brutal, but Izuku had expected as much. His true focus was on the practical.

 

Sitting in the massive, darkened auditorium, surrounded by hundreds of anxious applicants, Izuku listened intently to the booming voice of Present Mic, U.A.'s resident Voice Hero. The eccentric hero explained the rules on a massive digital screen: a ten-minute urban combat simulation. Applicants would be dropped into fake city centers and tasked with destroying three types of robotic 'villains,' each worth different point values.

 

"BUT WAIT, THERE'S MORE!" Present Mic shouted, striking a dramatic pose. "There's a fourth type of villain! The Zero Pointer! It's essentially an obstacle! If you see it, my advice is to run away! It's not worth the trouble!"

 

From the row ahead of Izuku, a tall boy with glasses and severely neat hair stood up perfectly straight, his hand chopping through the air like a blade.

 

"Excuse me, sir! But you have only explained three of the villains on the printout! If this is a misprint, then U.A., the most prestigious academy in Japan, should be ashamed!" The boy then turned around, his stern eyes locking directly onto Izuku. "And you, with the broad shoulders! You have been sitting completely still, staring at the screen without taking notes! If you are not taking this seriously, please leave!"

 

The auditorium went dead silent. Hundreds of eyes shifted to Izuku.

 

Izuku didn't flinch. He didn't blush. He simply met the boy's aggressive gaze with total, unflinching calm.

 

"I am not taking notes because I have an eidetic memory for combat variables," Izuku replied, his baritone voice carrying effortlessly across the quiet room without him needing to raise it. "The point values, terrain layout, and time limits are already committed to memory. Furthermore, an urban combat simulation against mechanical constructs suggests a test of adaptability and collateral damage management, not just raw power. I am taking this very seriously. Please sit down."

 

The boy with the glasses blinked, his mouth opening and closing a few times like a fish out of water. He had expected a delinquent, not a strategist. "I... I see. My apologies for the interruption." He bowed stiffly and sat back down.

 

Up on the stage, Present Mic grinned wildly. "ALRIGHT, NO NEED FOR HOSTILITIES, LISTENERS! THE EXAM IS ABOUT TO BEGIN! HEAD TO YOUR ASSIGNED BATTLE CENTERS! PLUS ULTRA!"

 

Izuku looked down at his examinee card. Battle Center B. He noticed Katsuki was assigned to Center A. The school had purposefully separated students from the same middle schools to prevent cooperation. Izuku stood up, cracking his neck. The heavy muscles in his back shifted.

 

Time to eat, Aegis vibrated within his ribs.

 

"Yeah," Izuku whispered. "Time to go to work."

 

 

 

Battle Center B was not a mere set. It was a fully realized, sprawling metropolis of concrete, glass, and asphalt, entirely walled off by massive metal barricades. Izuku stood at the front of a massive crowd of applicants before the giant blast doors. He was stretching his hamstrings, breathing in deep, measured cycles to oxygenate his blood.

 

He spotted Uraraka a few yards away, looking incredibly nervous, slapping her own cheeks to hype herself up. He considered wishing her luck again, but before he could step forward, the towering blast doors began to slowly grind open.

 

"RIGHT, LET'S START!" Present Mic's voice blasted from hidden speakers. "WHAT'S THE MATTER? THERE ARE NO COUNTDOWNS IN REAL BATTLES! RUN, RUN, RUN!"

 

The crowd of applicants froze for a microsecond, processing the sudden start.

 

Izuku didn't hesitate.

 

Before the doors were even a quarter of the way open, Izuku dropped his center of gravity and exploded forward. His massive thighs generated immense kinetic force, cracking the pavement beneath his sneakers. He shot through the gap in the doors like a cannonball, leaving the rest of the examinees in the dust.

 

As he crossed the threshold into the fake city, he tapped into the deep, oceanic reserve of his Quirk.

 

Aegis. Knight Protocol. Full body.

 

The manifestation was instantaneous and violent. From every pore on Izuku’s body, the pitch-black bio-metal erupted. It swallowed his tracksuit, encasing him in a second skin of hyper-dense, overlapping armor. It was sleek, aerodynamic, and terrifyingly beautiful. Vibrant, emerald-green luminescent lines flared to life along the seams of his arms, chest, and legs. Finally, the smooth, angular helmet snapped over his head, the vicious, V-shaped visor burning with blinding green light.

 

The physical enhancement was immediate. The armor wasn't just a shell; it possessed its own biomechanical musculature that synchronized with Izuku's.

 

A One-Pointer robot rolled out from a side alley, its single red eye locking onto him. "TARGET ACQUIRED."

 

Izuku didn't slow down. He didn't even break his stride.

 

He lowered his shoulder and slammed directly into the machine at sixty miles per hour. The sound of the impact was deafening—a horrific screech of tearing steel and shattering glass. The One-Pointer didn't just break; it exploded into shrapnel, utterly obliterated by the blunt-force trauma of Izuku's armored mass.

 

"One point," Izuku's voice synthesized through the helmet, a deep, robotic baritone.

 

Above the city, in a heavily fortified observation room lined with dozens of glowing monitors, the faculty of U.A. High watched in absolute silence.

 

Eraserhead—Shota Aizawa—narrowed his tired, bloodshot eyes at the screen displaying Battle Center B. "The kid in the black armor. Who is that?"

 

Principal Nedzu, a small, chimera-like creature in a sharp suit, tapped a tablet. "Examinee 7111. Izuku Midoriya. Quirk registered as 'Living Armor.' It appears to be an emitter/transformation hybrid of staggering density."

 

"Flashy," Aizawa muttered dismissively, though his eyes didn't leave the screen. "Brawlers who rely entirely on an invincible Quirk usually lack finesse. They cause too much collateral damage. They treat the city like a playground."

 

"I wouldn't be so sure, Aizawa," a booming, though subdued, voice chuckled. Toshinori Yagi, in his skeletal true form, stood in the back of the room, a proud grin stretching across his gaunt face. "Watch his footwork."

 

On the screens, three Two-Pointers surrounded Izuku in an intersection. Instead of recklessly swinging, the Black Knight moved with the calculated, terrifying grace of a master martial artist. He ducked under a mechanical tail swipe with millimeters to spare. He reached out, his armored fingers effortlessly piercing the steel chassis of the first robot, ripping its central processing unit out with a spray of sparks.

 

The second robot fired a barrage of rubber riot missiles. Izuku didn't dodge. He stood perfectly still, letting the projectiles bounce harmlessly off his chest plate without even registering the kinetic impact. The armor absorbed the shock entirely. In retaliation, Izuku pivoted, executing a flawless, high-angle roundhouse kick that cleanly decapitated the machine.

 

For the third robot, Izuku leapt into the air, the kinetic thrusters in the armor's calves venting high-pressure steam, launching him twenty feet up. He came down like a meteor, driving his fist through the top of the robot's head and pinning it to the asphalt.

 

"Fascinating!" Nedzu chirped, his paws flying across his keyboard. "The armor isn't just metal. It's a biological construct. It breathes, it vents heat, and it responds to his neural impulses at a zero-latency rate. He isn't piloting it; he is it."

 

"He's completely dominating the arena," Midnight noted, licking her lips. "And look! He's not causing unnecessary damage to the buildings. He's luring the machines into the center of the streets before dispatching them. He has incredible spatial awareness."

 

Aizawa remained silent, but the grip on his scarf tightened. The kid was good. Annoyingly good.

 

Back in the fake city, the exam had devolved into absolute chaos. Other applicants had finally entered the fray, using lasers, explosions, and acid to take down the remaining machines.

 

Izuku was a blur of black and green. He was currently sitting at sixty-five villain points. His internal calorie reserves were burning, but the Knight form was highly efficient. As long as he didn't expand the mass, he could fight like this for hours.

 

Hungry. More, Aegis purred aggressively in his mind, the armor literally shivering with battle lust.

 

"No," Izuku commanded internally. "We have enough points to pass. Now, we secure the perimeter and look for anyone who needs assist—"

 

A massive tremor interrupted his thoughts.

 

The ground beneath Izuku's armored boots violently shook, nearly knocking a nearby applicant with extending fingers off his feet. A horrific, grinding roar echoed through the concrete canyons of Battle Center B. The sun was suddenly blotted out.

 

Izuku looked up.

 

At the far end of the main thoroughfare, the buildings were being shoved aside like cardboard boxes. Bursting from the ground, crushing the asphalt beneath tank treads the size of houses, was a mechanical leviathan. It towered over the fake city, its massive arms ending in devastating wrecking balls. Its single, glowing red eye swept across the street, a siren blaring from its chassis.

 

The Zero Pointer.

 

The sheer scale of the machine was staggering. It was easily a hundred meters tall.

 

"Run! It's the Zero Pointer!" an applicant screamed, abandoning a wrecked Two-Pointer and sprinting in the opposite direction.

 

The crowd of examinees broke instantly, a wave of panicked teenagers fleeing from the unstoppable juggernaut.

 

Izuku stood his ground. He analyzed the machine. It was massive, slow, and entirely unnecessary to fight. Present Mic had said to avoid it. The most logical, strategic move was to retreat and ensure his passing grade.

 

He turned his back on the machine and prepared to jog away.

 

"Ow! My leg!"

 

The cry was faint, barely audible over the roaring engines of the Zero Pointer, but the auditory sensors in Izuku's helmet picked it up instantly.

 

Izuku whipped around.

 

Through the dust and debris kicked up by the giant machine, he saw her. The girl with the gravity Quirk. Uraraka. She was pinned beneath a massive slab of concrete that had been dislodged from a collapsing building. She was struggling, her face pale, trying desperately to touch the rubble to activate her Quirk, but her arms were pinned awkwardly.

 

The Zero Pointer's massive left tread was rolling forward. It was going to crush her in less than twenty seconds.

 

Izuku’s mind raced through a thousand calculations a second.

 

Option A: Sprint to her, lift the rubble.

Calculation: The Knight form is dense, but lifting a thirty-ton slab of concrete while ensuring it doesn't crush her further will take too long. The tread will reach us before she is clear.

 

Option B: Attack the tread to derail the machine.

Calculation: The Knight form lacks the necessary mass to halt the kinetic momentum of a hundred-meter machine. I would merely dent the steel before being driven into the asphalt.

 

There was only one option left. To stop a monster, you had to become one.

 

In the observation room, Toshinori gripped the railing so hard the metal groaned. "The girl is trapped! Is he going to try and save her?!"

 

"He doesn't have the leverage!" Aizawa snapped, reaching for the abort button to shut down the Zero Pointer. "He's human-sized! If he tries to stop that tread, he'll be crushed along with her! I'm terminating the exam—"

 

"Wait!" Nedzu cried out, his eyes wide, staring at the bio-metric readouts on his monitor. "Look at Examinee 7111's energy output! It's spiking! It's off the charts!"

 

In the fake city, Izuku planted his feet wide, anchoring himself to the asphalt.

 

Aegis, Izuku yelled in his mind, stripping away the restraints, unchaining the beast he had spent ten years learning to cage. FULL RELEASE. COLOSSAL PROTOCOL. DO NOT HOLD BACK.

 

A deafening, primal roar echoed from the armor, not a sound of metal, but a psychic scream of pure, unadulterated ecstasy. The armor had been waiting for this. It had been starving for this.

 

Izuku felt his caloric reserves violently empty. His stomach clamped down, a searing pain shooting through his core as the Quirk demanded fuel. He fed it everything.

 

To the applicants fleeing in terror, to Uraraka sobbing on the ground, and to the Pro Heroes watching through the cameras, the world seemed to stop.

 

The sleek, human-sized Knight armor violently shattered outward.

 

It didn't just grow; it exploded. A localized shockwave of displaced air blasted through the street, shattering every glass window within a three-block radius. The ground cratered, the asphalt completely disintegrating into dust beneath boots that were suddenly the size of tractor-trailers.

 

Black bio-metal cascaded upward, thick, jagged, and heavily plated. Exhaust ports the size of sewer mains tore open on the shoulders, venting massive plumes of superheated white steam into the sky. The green luminescent lines widened into roaring rivers of blinding emerald energy.

 

Uraraka stopped crying. She looked up, her jaw going slack, the pain in her leg entirely forgotten in the face of absolute, biblical awe.

 

Standing between her and the Zero Pointer was a Titan.

 

Izuku Midoriya, encased within the nape of the fifty-meter-tall colossus, looked through the massive V-shaped visor. He was suspended in a web of glowing green neural tendrils, feeling the unimaginable weight and power of the dreadnought. His heart was beating so fast it felt like a continuous hum in his chest. The starvation was already setting in, a gnawing black hole in his gut. He had less than two minutes before his body started cannibalizing its own organs.

 

Move.

 

The Colossus moved.

 

The sound of the giant taking a single step was like a bomb going off. The massive spiked boot slammed into the street, shaking the very foundations of U.A. High School.

 

The Zero Pointer, operating on basic combat AI, registered the sudden appearance of a massive obstacle. It raised its colossal right arm, winding up a devastating punch with a steel wrecking ball.

 

The machine swung.

 

Izuku didn't dodge. He didn't block.

 

The Colossus lunged forward, moving with a speed that blatantly defied the laws of physics for something of its mass. Izuku stepped inside the guard of the Zero Pointer. He caught the machine's swinging arm with his left hand, the black bio-metal fingers digging deep into the steel chassis. The impact sent a shockwave of compressed air screaming out, flattening the nearby streetlights.

 

CREAK. GROAN. SNAP.

 

Izuku squeezed his hand. The Colossus crushed the structural support of the Zero Pointer's arm, locking it in place.

 

Inside the observation room, absolute pandemonium had broken out. Present Mic was screaming. Midnight was staring, pale-faced. Aizawa’s hand hovered uselessly over the abort button, utterly paralyzed by the sheer, apocalyptic scale of the brawl happening on the screen.

 

"It's a Kaiju," Snipe whispered, his mask failing to hide his shock. "The kid is a walking weapon of mass destruction."

 

All Might, however, was smiling so wide his face hurt. Yes, young Midoriya! Show them! Show them the heart of a hero!

 

Back in the arena, the Zero Pointer tried to fire its secondary weapons, but Izuku gave it no quarter. This wasn't a boxing match. This was Pacific Rim. This was a brawl of titans.

 

Izuku stepped his massive right leg forward, planting it firmly against the lower chassis of the robot. He reached out with his massive right hand, the gauntlet glowing fiercely green, and grabbed the Zero Pointer directly by its armored 'neck'—the central column connecting the head unit to the body.

 

"GET AWAY FROM HER!" Izuku roared, his voice magnified through the Colossus, sounding like the wrath of a mechanical god.

 

Izuku engaged the kinetic thrusters on the elbows and shoulders of the armor. The massive exhaust vents blew blinding white steam across the city.

 

He pulled.

 

The Zero Pointer's internal motors screamed in protest. Steel tore. Wires snapped, erupting in showers of electrical sparks. The machine weighed thousands of tons, but the biological torque of the Colossal armor was absolute.

 

With a deafening, metallic shriek that echoed across the entire U.A. campus, Izuku cleanly tore the head and upper torso of the Zero Pointer clean off its chassis.

 

The lower half of the machine, dead and deactivated, slumped backward, crashing into the buildings behind it, completely immobilized.

 

Izuku held the massive, severed head of the Zero Pointer in his hands, oil and hydraulic fluid raining down from the torn cables like black blood. He looked over his shoulder, checking his trajectory, before casually tossing the multi-ton hunk of scrap metal a quarter-mile down the street, where it crashed harmlessly into an empty intersection.

 

Silence fell over Battle Center B.

 

The other examinees, peering out from alleyways and behind rubble, stared in catatonic shock. A fifty-meter titan of black and green metal stood victorious in the center of the ruined street, steam billowing from its shoulders, the broken corpse of U.A.'s ultimate obstacle at its feet.

 

Inside the cockpit, the adrenaline vanished, replaced instantly by agonizing, lethal exhaustion.

 

Izuku’s vision went entirely red, then black. The neural link severed.

 

Must... release...

 

To the awe of the onlookers, the towering Colossus didn't fall. It simply let out a massive, whistling hiss. The hyper-dense plating rapidly lost its molecular cohesion, instantly sublimating into a colossal cloud of thick, black vapor that drifted up into the sky.

 

As the vapor cleared, a lone figure plummeted toward the ground.

 

Izuku hit the asphalt hard, rolling several times before coming to a stop just a few feet away from the trapped Uraraka. The heavy musculature that had bulked his frame earlier that morning was significantly depleted. He looked gaunt, his tracksuit hanging loosely off his body. He was completely unconscious, his breathing shallow and rapid.

 

"T-TIME'S UP!" Present Mic's voice finally cracked over the loudspeakers, though it lacked its usual bombastic energy. The Voice Hero sounded genuinely shaken.

 

Uraraka stared at the boy lying on the pavement. He had summoned a god, torn a skyscraper-sized machine to pieces with his bare hands, and nearly starved himself to death, all to save a girl he had met five minutes ago.

 

Tears welled in her eyes. "Midoriya..."

 

A small, elderly woman walked out from the clearing dust, a large syringe in her hand. Recovery Girl looked at the devastation, then at the unconscious boy.

 

"Good grief," the old heroine sighed, shaking her head. "They always push themselves too far. But... my word. What a spectacular display of heroism."

 

She walked over to Izuku and injected a massive dose of highly concentrated liquid glucose and lipids directly into his thigh, before pulling back her lips and planting a healing kiss on his forehead. Izuku’s body visibly relaxed, his breathing steadying as the nutrients hit his system.

 

 

 

A week later, Izuku sat at his kitchen table, nervously staring at a small, circular device that had arrived in the mail. His mother peeked around the corner of the hallway, biting her nails.

 

He had spent the last seven days doing nothing but eating and sleeping, slowly regaining the mass he had sacrificed in the Colossal manifestation. He felt hollow, anxious. What if the collateral damage had failed him? What if U.A. deemed him too dangerous to be a student?

 

He pressed the button on the device.

 

A holographic projection shot up, illuminating the dimly lit kitchen. All Might appeared in the projection, wearing a bright yellow suit.

 

"I AM HERE AS A PROJECTION!" All Might boomed.

 

Izuku gasped. "All Might? Why is he..."

 

"Young Midoriya!" All Might pointed directly at the camera. "You performed spectacularly on the written exam! But the practical exam... well, my boy, you gave us quite a shock!"

 

The projection switched to footage of the exam. It showed Izuku in his Knight form, flawlessly dismantling the robots.

 

"You scored an impressive sixty-five villain points, easily putting you in the passing bracket! But at U.A., we don't just grade on combat ability."

 

The footage switched. It showed Uraraka trapped, and the Zero Pointer bearing down. It showed Izuku, throwing aside his own safety, summoning the Colossus, and tearing the machine apart with his bare hands to save her.

 

"A hero course that rejects those who save others in their time of need is no hero course at all!" All Might proclaimed, his voice softening with genuine emotion. "You risked your life—and your own physical limits—to protect a fellow student. The judges were unanimous!"

 

The screen updated, showing a scoreboard.

 

"Sixty-five villain points! And... SIXTY RESCUE POINTS!"

 

Izuku’s eyes widened to the size of saucers. One hundred and twenty-five points.

 

"You scored first place, Young Midoriya! You shattered the all-time school record!" All Might smiled, holding out his hand toward the screen as if reaching out to him. "Come, Izuku Midoriya. This is your Hero Academia!"

 

The hologram clicked off.

 

Izuku sat in silence for a long moment. He looked down at his chest.

 

Happy, Aegis hummed softly, a warm, comforting vibration.

 

Izuku smiled, tears finally spilling over his cheeks. He clutched his chest, feeling the heartbeat of the titan that lived within him.

 

"We did it," he whispered. "We're going to U.A."

 

The uniform jacket of U.A. High School was crafted from high-quality, reinforced materials, designed to accommodate a wide variety of body types and minor mutant Quirks. Yet, as Izuku Midoriya stood before the full-length mirror in his bedroom, he couldn't help but feel that the gray blazer was struggling to contain him.

 

He rolled his shoulders, the thick slabs of muscle across his back pulling the fabric taut. The gold buttons down the front gleamed in the morning light, securely fastened but undoubtedly under tension. He tugged at the red tie, adjusting it so it sat neatly against his collar.

 

Ten years of eating like a bear preparing for hibernation and training like a professional strongman had sculpted his body into a biological fortress. He looked less like a first-year high school student and more like a seasoned Pro Hero in his prime.

 

Today is the day, Izuku thought, his emerald eyes staring back at him in the mirror.

 

Behind his sternum, a familiar, comforting weight shifted. A low, rhythmic thrumming pulsed through his chest—a vibration so deep it was felt more than heard. Aegis was waking up. The symbiotic bio-metal woven into his skeletal structure could sense the influx of nervous excitement coursing through Izuku’s nervous system.

 

New territory. Pack moving. Ready.

 

The abstract, instinctual thoughts of the armor brushed against Izuku’s consciousness. Over the years, Izuku had come to understand Aegis’s unique language. It was a creature of absolute loyalty, driven by a singular, obsessive directive to protect its host. But it was also territorial, slightly aggressive, and possessed a massive appetite.

 

"Calm down, buddy," Izuku whispered, gently patting his chest right over his heart. "We're just going to school. No fighting today. We have to make a good impression. We can't let them think we're a monster."

 

The vibration settled into a steady, neutral hum.

 

Izuku turned away from the mirror, slinging his massive yellow backpack over his shoulder. The bag clinked heavily; it was packed not only with textbooks and notebooks but with densely compressed nutritional bars, three liters of his mother's patented calorie sludge, and several jars of peanut butter. If he was going to be using his Quirk in a heroics course, he needed fuel on standby at all times.

 

He walked into the kitchen, where Inko was already waiting by the door. She reached up, straightening his collar and brushing a stray green curl from his forehead. Tears brimmed in her eyes.

 

"My baby," Inko sniffled, offering him a watery, overwhelmingly proud smile. "You look so handsome. A real U.A. student."

 

"Thanks, Mom," Izuku smiled warmly, leaning down to hug her. Even with his immense strength, his touch was incredibly gentle. He had spent his entire life mastering restraint. "I'll make you proud."

 

"You already do, Izuku. You already do. Now go! Don't be late on your first day!"

 

The commute to U.A. was a quiet exercise in mental preparation. The morning air was crisp, the streets of Musutafu bustling with commuters. Izuku walked with a measured, heavy stride. He towered over most of the people on the train, drawing a few lingering stares, but he paid them no mind. His focus was entirely internal.

 

He was walking into the most prestigious hero academy in the nation. He had scored first place in the entrance exam by a staggering margin, breaking the all-time school record. But that achievement carried a heavy burden. The faculty had seen his Colossal form. They had seen the sheer, apocalyptic destruction he was capable of. He knew what they would be thinking. They would be looking at him not just as a student, but as a potential liability. A Walking Natural Disaster.

 

He had to prove today that he held the leash. That he was the master of the beast, not the other way around.

 

When he finally arrived at the massive, overarching gates of the campus, he navigated the labyrinthine hallways until he found a door that was obnoxiously large, standing nearly ten feet tall with '1-A' painted in massive red letters.

 

Izuku stood before the door. He took a deep breath, regulating his heart rate, ensuring Aegis remained entirely dormant. He reached out and slid the massive door open.

 

The classroom was already buzzing with energy. Several students were gathered in small clusters, chatting animatedly. Izuku recognized a few faces from the exam, but his eyes immediately locked onto a familiar head of spiky, ash-blonde hair near the window.

 

Katsuki Bakugo sat with his feet propped up on his desk, his arms crossed behind his head, looking supremely bored.

 

Standing directly in front of Katsuki, chopping his hands through the air with robotic precision, was the tall, glasses-wearing boy from the auditorium.

 

"Take your feet off that desk immediately!" the boy demanded. "It is disrespectful to the upperclassmen who sat there before you, and to the craftsmen who made the desk!"

 

"Huh?" Katsuki sneered, his ruby eyes narrowing. "Which middle school are you from, extra? You want me to blow you away?"

 

"B-Blow me away?! What kind of attitude is that for someone intending to become a hero?!" The boy adjusted his glasses, looking thoroughly scandalized. "I am Tenya Iida, from Somei Private Academy!"

 

"Somei? So you're an elite, huh?" Katsuki grinned, a feral, competitive spark in his eyes. "I'm going to have fun crushing you."

 

Iida gasped, taking a step back. But before he could formulate a retort, he noticed the massive figure standing in the doorway.

 

The entire classroom seemed to quiet down as Izuku stepped inside. His sheer physical presence commanded the room's gravity. Iida immediately abandoned Katsuki and marched straight toward Izuku.

 

"You!" Iida announced, stopping a polite distance away and bowing perfectly at a ninety-degree angle. "I am Tenya Iida! I must apologize to you!"

 

Izuku blinked, slightly taken aback by the sheer intensity of the greeting. "Oh. I'm Izuku Midoriya. Nice to meet you, Iida. Apologize for what?"

 

Iida stood up straight, his expression entirely earnest. "During the orientation, I misjudged you! I accused you of not taking the exam seriously. But you realized there was a hidden metric—the rescue points! You saw through the facade of the test and executed a flawless strategy, going so far as to sacrifice your own physical well-being to defeat the Zero Pointer and save a fellow examinee! I completely missed it. I hate to admit it, but you are better than me!"

 

Izuku held up a hand, feeling a bit of heat rise to his cheeks. "I didn't realize there was a hidden metric, Iida. I just heard someone in pain and moved. The exam rules didn't matter at that moment."

 

Iida’s eyes widened behind his glasses. He looked as though he had just been struck by a revelation. "He didn't even know... he acted purely on the instinct of a true hero!"

 

"Hey! Midoriya!"

 

Izuku turned to see the girl with the bobbed hair pushing her way through the small crowd. Uraraka Ochako was beaming, her cheeks flushed with excitement.

 

"You passed! I knew you would!" she cheered, stopping in front of him. "That punch you did! It was insane! You were like a giant mecha! Bam! Pow! I wanted to thank you properly for saving me, but you were out cold on a stretcher."

 

"I'm glad you're okay, Uraraka," Izuku smiled, his deep voice carrying a gentle warmth. "And thank you for stopping my fall outside the gates. We're even."

 

"If you're just here to make friends, you can pack up your things and leave."

 

The voice didn't come from a student. It came from the floor.

 

Izuku, Iida, and Uraraka looked down. Lying in the hallway, just outside the door frame, was a man encased head-to-toe in a bright yellow sleeping bag. He looked like a giant, disheveled caterpillar.

 

The caterpillar unzipped itself. A tall, incredibly exhausted-looking man stepped out. He wore a baggy black jumpsuit, a scarf made of gray, overlapping bandages, and had long, unkempt black hair that framed a face heavily shadowed by dark circles. He held up a juice pouch, took a slow sip, and stared at the class with eyes that looked entirely devoid of joy.

 

"It took you lot eight seconds to quiet down," the man droned, stepping up to the teacher's podium. "Time is a limited resource. You kids aren't rational enough."

 

Izuku recognized him instantly. The scarf, the eyes, the underground aesthetic.

 

Eraserhead, Izuku thought, his mind racing. A Pro Hero who specializes in Quirk nullification. He can erase an emitter or transformation Quirk just by looking at the target. Why is a covert specialist teaching homeroom?

 

"I'm your homeroom teacher, Shota Aizawa," the man said, pulling a folded stack of blue and white uniforms from his sleeping bag. "Nice to meet you. Now, put these P.E. uniforms on and head out to the training field."

 

 

 

The training field was a sprawling expanse of perfectly manicured grass and chalk-lined tracks, baking under the bright morning sun.

 

Class 1-A stood in a loose cluster, dressed in their U.A. tracksuits. While the blue and white uniforms looked standard on most of the students, on Izuku, the short-sleeved shirt clung tightly to his biceps and chest, showcasing the terrifying results of his decade-long physical conditioning. Even Katsuki, who was undeniably fit, looked small standing a few feet away from him.

 

"A Quirk Apprehension Test?!" the class shouted in unison.

 

"What about the entrance ceremony? Or guidance sessions?" Uraraka asked, stepping forward with a worried expression.

 

Aizawa turned his back to the class, looking out over the field. "No time for that. If you're going to be heroes, you don't have time for leisurely events. U.A. is known for its unrestricted traditions. That means I run my class however I see fit."

 

He turned his head, his bloodshot eyes locking onto the students. "You've been doing these tests since middle school. Fifty-meter dash, grip strength, standing long jump, softball throw. But you always did them without your Quirks. The country still insists on keeping records uniform, so they prohibit Quirk use in physical tests. It's irrational. The Department of Education is just procrastinating."

 

Aizawa pointed a finger at Katsuki. "Bakugo. You finished first in the practical exam for villain points. What was your farthest softball throw in middle school?"

 

Katsuki stepped forward, rolling his shoulder. "Sixty-seven meters."

 

"Try it with your Quirk," Aizawa instructed, tossing a baseball to the explosive boy. "Do whatever you want, just don't leave the circle."

 

Katsuki stepped into the chalk circle. He grinned fiercely, stretching his arms. He wound up, his muscles tensing. "DIE!" he roared, hurling the ball.

 

At the point of release, a massive explosion erupted from his palm. The shockwave kicked up a cloud of dust, and the ball rocketed into the sky, leaving a trail of black smoke in its wake.

 

The class watched in awe. Aizawa held up a small electronic device. It beeped, displaying a number.

 

"Know your own maximum first," Aizawa said, turning the screen toward the students.

 

705.2 meters.

 

"Seven hundred meters?! That's awesome!" a boy with red, spiky hair yelled, pumping his fist.

 

"We can use our Quirks as much as we want! This looks like so much fun!" a girl with pink skin and small horns cheered.

 

The atmosphere shifted instantly. Aizawa's tired expression darkened into a chilling scowl. The air temperature seemed to drop.

 

"Fun?" Aizawa repeated, his voice dangerously low. "You have three years to become Pro Heroes. Are you going to have an attitude like that the whole time? Fine. Whoever ranks last in total points across all eight tests will be judged as having no potential, and will be punished with expulsion."

 

The class erupted in panic. "Expulsion?! On the first day?!" Uraraka cried. "That's completely unfair!"

 

"Natural disasters, massive accidents, ego-driven villains," Aizawa listed off, his eyes sweeping over the students. "Calamities whose time or place can't be predicted. Japan is covered with unfairness. Heroes are the ones who reverse those situations. If you wanted to talk to your friends at McDonald's after school, too bad. For the next three years, U.A. will inflict hardship after hardship on you. Go beyond. Plus Ultra. Overcome it with all you've got."

 

Aizawa paused. His gaze drifted past Katsuki, past Iida, and locked directly onto Izuku.

 

Izuku felt the weight of that stare. It was heavy, analytical, and entirely unforgiving.

 

"Midoriya," Aizawa said, his voice cutting through the murmurs of the class.

 

Izuku stood up perfectly straight. "Yes, Aizawa-sensei."

 

"You crushed the Zero Pointer. A spectacular display of raw, apocalyptic power," Aizawa stated, his tone devoid of any praise. "But power without control is just a hazard. A hero who levels a city block to stop a purse-snatcher is a villain in disguise. I watched the tapes. Your Quirk draws on immense mass. If you think you can just summon a fifty-meter arm to solve every problem today, think again. If you endanger this class, or cause unnecessary structural damage to this facility, I will erase your Quirk and expel you on the spot. Am I understood?"

 

The class turned to look at Izuku. The boy who had seemed so polite in the classroom was suddenly being addressed as a ticking time bomb.

 

Izuku didn't flinch. He understood exactly what Aizawa was doing. The teacher was testing his ego. He was testing to see if the boy with the god-like Quirk had the arrogance to match it, or the discipline to restrain it.

 

Izuku bowed his head respectfully. "Understood, Sensei. I will demonstrate absolute control."

 

Aizawa's eyes lingered on him for a second longer before he turned away. "Good. Let's begin. Test one: 50-Meter Dash."

 

 

 

The students lined up in pairs at the starting line.

 

Izuku stepped up to the line alongside a girl with long, dark green hair tied in a bow at the bottom. She had wide eyes and a slightly amphibious posture.

 

"I'm Tsuyu Asui," she croaked softly, crouching down into a frog-like starting position. "Call me Tsu."

 

"Izuku Midoriya," he replied, giving her a nod.

 

Izuku didn't crouch. He stood tall, analyzing the distance. Fifty meters. He needed explosive speed, but the sheer weight of his body—which was heavily dense even without the armor—meant his initial acceleration would be slightly sluggish by superhuman standards. He needed a localized boost.

 

Aegis, Izuku communicated inward. Knight Protocol. Calves and soles only. Thruster configuration.

 

Fast. Run, Aegis vibrated eagerly.

 

Izuku rolled his tracksuit pants up to his knees. The class watched closely, eager to see the 'apocalyptic power' Aizawa had mentioned.

 

From the pores of Izuku's lower legs, the pitch-black bio-metal seeped outward, hardening instantly. It didn't coat his entire body; it strictly encased his calves, ankles, and feet. The armor was sleek, interlocking perfectly with his muscles. Vibrant green lines flared to life along his shins, and at the back of his calves, the armor formed thick, metallic exhaust ports.

 

Aizawa, standing at the finish line, narrowed his eyes. Localized manifestation. He's altering the shape of the armor for a specific function without fully engaging the mass. Good.

 

"On your marks," a robotic camera drone announced. "Get set... GO!"

 

Tsuyu launched herself forward with an incredible, frog-like leap, soaring through the air.

 

Izuku didn't leap. He drove his armored foot into the ground.

 

BOOM.

 

A concentrated blast of superheated kinetic steam erupted from the exhaust ports on his calves. The thrusters ignited with blinding force. The acceleration was instantaneous and violent. Izuku didn't so much run as he did launch himself across the track like a low-flying missile. The sheer kinetic force of his takeoff kicked up a localized dust storm, sending the nearby students shielding their eyes.

 

He crossed the finish line in a blur of black and green.

 

"2.50 seconds!" the drone chimed.

 

Tsuyu landed a moment later. "5.58 seconds!"

 

Izuku stood up, the thrusters dying down. He took a short breath, instantly commanding the armor to retreat. The black metal dissolved into vapor, vanishing back into his skin before the dust had even settled.

 

"Whoa!" the red-haired boy, Kirishima, yelled. "He didn't even use the giant form! He just made rocket boots out of his own legs! That's so manly!"

 

Katsuki clicked his tongue, his eyes tracking Izuku's time. 2.5 seconds. He's refined his partial manifestations. The bastard is faster than he was in middle school.

 

Test Two: Grip Strength.

 

Izuku walked over to the grip-measuring machine. The machine was designed for normal human limits, perhaps pushing slightly into the low-tier enhanced strength range.

 

He gripped the handle. He didn't even manifest the armor externally. He simply commanded Aegis to reinforce the skeletal density of his hand internally. His skin remained normal, but beneath the flesh, his bones became hyper-dense bio-steel.

 

He squeezed.

 

The digital counter skyrocketed. It hit 400kg, then 600kg, then 800kg, before the metal handle shrieked and crumpled entirely beneath his fingers, the machine short-circuiting with a spark.

 

"Error. Max Capacity Exceeded," the screen flashed.

 

Izuku sheepishly handed the broken machine to a stunned Iida. "Ah. Sorry. I think I applied too much torque."

 

Iida pushed his glasses up, staring at the crushed steel. "Incredible... your baseline physical strength is monstrous even without the metallic coating!"

 

Test Three: Standing Long Jump.

 

Izuku used the localized calf-thrusters again, launching himself completely over the sandbox and landing softly on the grass on the other side.

 

Test Four: Repeated Side-to-Side Steps.

 

Izuku relied entirely on his natural musculature, not wanting to burn unnecessary calories with the armor. His heavy frame made him slightly slower in rapid directional changes than the smaller students like Mineta, who bounced on sticky purple balls, but Izuku still scored in the upper quartile purely based on his explosive leg power.

 

By the time the fifth test rolled around, Izuku was breathing steadily, a light sheen of sweat on his brow. He popped a dense, chocolate-flavored calorie chew into his mouth, chewing methodically. He was preserving his energy perfectly.

 

"Test Five: Softball Throw," Aizawa announced.

 

This was the big one. This was the test that required maximum output.

 

Uraraka stepped into the circle. She tapped the ball, removing its gravity, and threw it lightly into the air. It continued upward, forever.

 

"Infinity," Aizawa revealed, showing the screen. The class cheered.

 

"Midoriya. You're up," Aizawa said, his voice flat.

 

The chatter among the students died down instantly. They had seen Izuku's speed and grip strength, but Aizawa had specifically called him out regarding this test. How was the 'Walking Natural Disaster' going to throw a softball?

 

Izuku stepped into the chalk circle. He stood there for a moment, rolling the small white ball around in his massive hand. He looked out over the vast, empty expanse of the training field.

 

He closed his eyes.

 

Aizawa wants to see control, Izuku thought. If I use the Knight form, the thrusters in the arm will get me a decent distance. Maybe a thousand meters. But that's just a mechanical launch. He wants to know if I can summon the beast without letting it break the leash. He wants to know if I can use the Colossus safely.

 

Izuku opened his eyes. They were focused, sharp, and entirely devoid of hesitation.

 

Aegis, Izuku commanded, the mental voice echoing with absolute authority. Colossal Protocol. Right arm only. We anchor heavy. Do not expand beyond twenty feet. Control the mass.

 

Aegis responded immediately. A fierce, eager rumble shook Izuku's chest. BIG. THROW. STRONG.

 

Izuku widened his stance, dropping his center of gravity. He dug his left sneaker into the dirt.

 

Then, he unleashed the armor.

 

The transformation was deafening. The sleek, black bio-metal erupted from his right shoulder, roaring down his bicep and forearm. But it didn't stop at the skin level. The mass multiplied violently. The metal groaned and shrieked, expanding outward in thick, jagged, heavily armored plates.

 

The sheer localized displacement of air sent a shockwave washing over the class. Uraraka gasped, shielding her face with her arms as a gale-force wind blew her hair back. Katsuki stood his ground, his eyes wide, watching the horrifying growth of the appendage.

 

In a matter of seconds, Izuku’s right arm had transformed into a gargantuan, twenty-foot-long mechanical limb. The arm was thicker than a redwood trunk, plated in obsidian bio-steel, with glowing emerald rivers of energy pulsing furiously along its seams. Massive exhaust vents on the shoulder hissed, leaking white-hot steam.

 

Izuku stood in the circle, his normal-sized body anchoring the colossal weight of the giant arm. His left leg sank a full two inches into the solid dirt from the sheer gravitational burden.

 

Aizawa didn't blink. His hair wasn't floating; his Quirk wasn't active. He was watching. He's isolated the gigantification to a single limb. The torque required to swing that mass without tearing his own human shoulder socket apart... the armor must be integrating directly into his spine to distribute the load.

 

Inside the localized neural-link of the arm, Izuku felt the immense, terrifying power of the Colossus. It was begging to be unleashed entirely. It wanted to consume his calories and grow to fifty meters. It wanted to shatter the sky.

 

Stay, Izuku ordered the armor, gritting his teeth as the caloric drain hit his stomach like a punch. Just the arm.

 

Izuku wound up.

 

The biomechanics of swinging a twenty-foot arm were monstrous. Izuku engaged the kinetic thrusters at the massive elbow joint. The vents flared with blinding white light.

 

With a roar that was half-human, half-mechanical, Izuku hurled the ball.

 

CRACK.

 

The sound was not a thud, nor a swoosh. It was the deafening, explosive crack of a sonic boom. The Colossal hand snapped forward with such unimaginable velocity that it broke the sound barrier at the point of release.

 

A visible shockwave ring expanded outward from the Colossal hand, tearing up the grass in a fifty-foot radius and sending a concussive blast of wind over the students. Mineta was blown backward, yelping as Iida caught him.

 

The softball vanished. It didn't fly; it was simply erased from the immediate airspace, rocketing into the stratosphere with a trail of displaced air cutting through the clouds.

 

Izuku immediately disengaged.

 

The massive arm sublimated into thick black vapor, hissing violently as it evaporated into the air. Izuku stood in the center of the circle, his right arm returning to normal flesh and blood. He was panting slightly, a bead of sweat running down his cheek, but he remained standing tall, perfectly balanced. He reached into his pocket, pulled out another calorie chew, and popped it into his mouth.

 

Silence reigned over the field.

 

Aizawa looked down at the electronic device in his hand. The screen was still calculating, the numbers climbing rapidly before finally coming to a halt.

 

Aizawa let out a long, slow breath. The corners of his mouth twitched upward in a microscopic, almost imperceptible smirk.

 

He didn't just throw it, Aizawa thought, genuinely impressed. He perfectly calculated the exact mass-to-velocity ratio required to launch the projectile without generating a shockwave strong enough to damage the school buildings behind him. He held back the apocalypse just enough to pass the test. He truly has the beast on a leash.

 

Aizawa turned the screen toward the class.

 

2,054.3 meters.

 

The class erupted.

 

"Two thousand meters?!" Kirishima screamed, clutching his head. "That's insane! That's more than double Bakugo's throw!"

 

"Did you see the size of that arm?!" a boy with blonde hair and a black lightning bolt streak yelled. "It was like a Kaiju just sprouted out of him!"