Chapter 1: Prologue
Chapter Text
Prologue
(...)
The interrogation room was small, windowless, dimly lit by a single lamp hanging from the ceiling. The faint hum of the fluorescent bulb was the only sound accompanying Izuku Midoriya. Seated with his wrists cuffed to a polished steel table, he had no company but his thoughts. The air reeked of metal, dried sweat, and something else—something he recognized all too well: guilt.
Beyond the door, the murmur of footsteps, hushed voices, and the rustling of papers kept him tethered to reality. He knew he was being watched. The same officers who had arrested him were behind the one-way mirror, observing, waiting for him to break.
But Izuku was already broken.
His fingers trembled slightly on the metallic surface, though not from the cold. His anxiety clenched his chest like an invisible vice. There was no escape. No comfort. His mind returned again and again to the same moment, like a blade reopening an old wound.
The blood.
He could still see it on his hands, even after washing them at the hospital. He felt it under his nails, in the creases of his palms, as if his skin had absorbed it. He squeezed his eyes shut. It was useless. There it was again—the smug smile of that man before he fell, the satisfied look in his eyes in those final seconds.
“She enjoyed it, didn’t she?” he had said.
And Izuku… Izuku didn’t know if it had been out of rage, fear, or an inhuman need for justice. But he did it.
He killed him.
The door remained closed. No one came in. They left him there, trapped with his memories, his shame, all of it weighing heavier than the handcuffs around his wrists. The air grew thicker, as if the entire room had sealed itself off to suffocate him with his emotions.
A drop of sweat rolled down his temple. He didn’t notice.
Guilt left no room for the rest of the world.
Every time he managed to recall why he had committed that sin, he arrived at the same answer: rage. A silent, blond, merciless fury—directed at himself, at others, at the system that had betrayed him.
And with it, like an inevitable tide, came sadness. Because in the end, there had been a victim. Someone who shouldn’t have paid the price for his incompetence, his weakness, his failure to protect her.
The clearest memory he kept wasn’t of the act itself, nor the blood, nor the screams of the witnesses who saw him do it. It was the image of himself, sitting on the edge of a bed, gripping the fragile fingers of a girl with tubes running into her, her face nearly unrecognizable beneath the bandages. Her brown hair still bore traces of dried blood. And even so, he held her hand as if his touch could breathe life back into her—as if his mere presence could alter the course of events.
Now, his beloved lay in a hospital bed at Musufatu Regional, trapped in a sleep from which she might never awaken.
And all he had left was regret. A weight that didn’t lessen with the passing days at her side, but grew with every heartbeat. Like a second heart, pulsing guilt.
The monitor beside her beeped slowly, rhythmically. The air was thick with disinfectant, sadness, and defeat. No one told him to leave. But he understood when footsteps approached, a rhythm that didn’t belong to nurses.
Three officers. In uniform. Silent. Avoiding eye contact. One of them brought out the handcuffs. The other two carried the report. No shouting. There was no need. Everything had already been said.
Izuku only managed to glance one last time at the girl he loved before they took him away, knowing that the only comfort he had left was that he had avenged her. He didn’t cry. He couldn’t. He had run out of tears long before.
Several days passed in solitary confinement at a state prison before they called him back to the interrogation room, without offering any explanation.
He was a murderer now, and Izuku knew it all too well. He had crossed the line, and there was no turning back. All that remained was to await the sentence that loomed over him for having exacted his vengeance, even at the cost of losing everything.
However, what happened next was a twist of fate he never could have imagined.
It all began with a dry click—the sound of the steel door unlocking. But it didn’t open immediately.
Izuku raised his head, feeling the pulse in his neck intensify. The footsteps that followed weren’t hurried. They were deliberate, measured. Three pairs, maybe four. One of them lighter, almost inaudible.
And when the door finally swung fully open, he saw the impossible: Principal Nezu stepping over the threshold, flanked by men in dark suits—the same ones he had seen prowling the hallway when he was escorted there.
Nezu didn’t speak at first. He walked with the composure of someone intimately familiar with the ground he tread. His small, round eyes glimmered under the dim light. He stopped at the table, between the creaking of leather from his bodyguards and the ever-present buzz of the fluorescent bulb.
“Good afternoon, Izuku,” he said politely, almost warmly, as if visiting a student in his office and not a condemned boy in a prison cell.
Izuku didn’t reply. He just stared. The cuffs dug into his wrists, a constant reminder of what he had done.
“I read your companion’s medical report,” Nezu continued after a brief pause. “She’s alive. If you can call that living. Your mother, by the way, is alive as well. Though she’s barely sleeping while trying to scrape together funds. Do you know how much a competent attorney costs for a case like this?”
Izuku swallowed. One of his fingers twitched.
“In case you were wondering, the Academy continues its usual activities. Your classmates keep asking about you… Well, there are rumors. Some struggle to believe it. Others don’t. Some understand. Others don’t want to. It doesn’t matter anymore.”
Nezu took a seat in the chair one of the men subtly pushed toward the table. He leaned forward, maintaining his courteous tone.
“The prosecution wants to charge you with third-degree murder. Maybe they’ll succeed. Maybe not. But the truth is”—he said, with a slight curl of his lips that wasn’t quite a smile—“justice rarely has room to understand noble motives when blood has been spilled.”
Then he looked down, raised his gaze again, and met Izuku’s eyes with chilling clarity.
“You’re a murderer, Izuku. And no one will blame you for what you did. Not after what that bastard did to that poor girl. But unfortunately, in our justice system, you’re still a murderer.”
The silence that followed weighed heavier than any sentence.
“What you’ve done can’t be undone,” Nezu finally said, his voice lower now. “But there’s a way to make sure it doesn’t destroy what you still have left. You won’t be a hero in the public eye. There’ll be no applause, no costumes, no magazine covers. But you’ll be on the right side of this eternal war between heroes and villains.”
Izuku barely managed to lift his gaze. It was like being dragged toward a cliff from which he had already jumped.
“What… are you proposing?”
Nezu nodded, pleased to have broken his silence.
“A transfer. To a special class. Off the public record. We call it Class S. They're essentially faceless agents, trained to carry out missions no one can know about, but for which many will be thankful—without ever realizing why. You'll be taught how to disappear, how to hunt in the dark, how to make decisions the heroes on magazine covers wouldn’t dare make without soiling their capes.”
Izuku swallowed.
“A secret class? Of killers?”
“Of soldiers,” Nezu corrected. “Of shadows. Of those who clean the filth without expecting medals. You belong there. Not because you’re a monster, but because the world needs someone who has crossed the line—and still chooses not to be lost to it.”
One of the men in suits placed a manila envelope on the table.
“That’s the contract. It’s your only way out—without dragging your mother down with you… and without remaining just another boy shackled to a hospital bed, waiting for her to wake up.”
Izuku didn’t touch the envelope. He just stared at it.
“And if I refuse?”
Nezu rose from his chair, his voice never rising.
“Then the story ends here. You and your mother will bear a tragic fate that will drag you both down. You’ll be a martyr without an altar! Just another sad headline on the evening news. It’s your choice, Midoriya-san.”
Silence returned, sharp as a blade.
Izuku closed his eyes. Her bandaged face surfaced in his mind. And with a slow, almost imperceptible tremor, he reached for the envelope.
“I’ll sign.”
Nezu nodded, without satisfaction—only with a quiet resignation.
“Then, Izuku Midoriya… welcome to the dark side of heroism.”
And the room once again fell silent.
To be continued...
Chapter Text
Chapter [1]
Notes:
I hope you enjoyed it. Don’t forget to leave a comment and let me know what you think.
What are your thoughts on Mina being Izuku’s childhood friend? Let’s say they’ve known each other since they were two—practically their whole lives.
Chapter Text
Chapter [2]
(...)
There was no turning back. The last box landed hollowly against the edge of the metallic truck bed, and with that final sound, Izuku Midoriya knew he had just buried his previous life. He closed the institutional van’s hatch with a metallic creak that felt more like sealing a tombstone. The sky was beginning to lighten—gray, heavy—as if even dawn itself was reluctant to arrive.
Izuku climbed into the passenger seat, silent and unwilling. And there he was. That same rugged face, the scar slicing across his cheek like a broken smile, and that gray hair that didn’t seem to age—just harden. Mad Dog Kishibe. The grizzled agent he had met not long ago, right after the trial, when he was acquitted and taken to the Commission to discuss his future as the newest member of Class S.
“You took a damn century,” Kishibe muttered without looking at him, as if his voice were part of the ignition. “Your first class starts in less than an hour, and I’m not giving you an extreme sports tour to make it on time.”
Izuku leaned his head back against the seat and closed his eyes for a second.
“Whatever. Just start the engine and take me to hell.”
Kishibe scoffed with a hollow, sarcastic laugh, starting the engine with one hand while holding a rusted thermos with the other.
“Kids these days... wasting time when a cute girl cries to say goodbye. I guess that pink-haired brat didn’t know you were off to school-registered prison today.”
Izuku opened his eyes and glanced at him sideways. Mina. He was talking about Mina. Had he seen her? Spied on her? He didn’t ask. There was no point. He just turned his gaze back to the road.
The rear gate of U.A. closed behind them like the jaws of a predator. They drove past the cameras, beyond the visible limits of the campus. Three government vehicles emerged ahead, joining the convoy—dark and silent as hungry crows.
“A full escort,” Izuku said, voice flat. “I suppose you don’t want your ‘new investment’ running away.”
“We don’t want surprises on your first day. Especially if your Quirk involves speed,” Kishibe replied. “You’re a valuable asset… on paper.”
They traveled in silence for ten minutes. Only the engine’s hum and the dull thump of tires broke the quiet. Then Kishibe spoke, eyes still fixed on the road.
“I’ve been assigned as the lead supervisor for the project. I’ll be your babysitter, Midoriya. The liaison between Nezu, the Commission… and all the ‘charming classmates’ you’ll meet.”
Izuku crossed his arms.
“The Commission needs a babysitter for a bunch of teens who no longer own their freedom? We’re under surveillance, exiled from normal life. Even the teachers are people from the underworld who used to work for you. And they still need you?”
Kishibe let out a dry chuckle, rasped by the cigarette he lit without asking.
“I’m here to watch Nezu, not you. To make sure the rat honors the deal. This whole initiative... could be genius, or a teenage catastrophe more powerful than anything hero society has ever seen.”
He exhaled a slow stream of smoke.
“When the first covert op comes... I’ll be your damn babysitter. Because everything depends on one thing: not screwing it up too badly.”
He said nothing more. None was needed. Silence stretched until the pavement gave way to gravel, and the convoy rolled to a stop.
They had arrived.
Ahead lay a rural dirt path hidden among trees and farmland. An unmarked fork in the road, absent from any map, eerie enough to send a chill down Izuku’s spine.
Kishibe stepped out first. He looked back at the boy from outside the vehicle and said bluntly:
“Get out. I’m serious.”
Izuku frowned but obeyed. A damp breeze swept through the nearby crops. He stood face to face with the agent. In one swift, almost aggressive motion, Kishibe yanked out his earpiece and crushed it under his boot.
“All units,” he said loudly, “go blind for five minutes. I’m calling in one of the many favors you owe me.”
Within seconds, the convoy’s windows polarized. No one could see them now.
Kishibe locked eyes with him. And, surprisingly, he didn’t look like a soldier. He looked tired.
“What I’m about to do, I did with all your future classmates. I brought each of those bastards here and offered them the same thing: a final way out. I’m still shocked that every single one said no. Now we’ll see if the last recruit—meaning you—will accept or reject what I’m about to offer.”
Izuku swallowed hard and crossed his arms.
“Tell me what you have to say! And make it quick—I’m going to be late on my first day.”
Kishibe sighed, his expression hardening.
“Before you enter that path, you’ll cross a barrier. An invisible dome. It blocks communications and inhibits signals. Only Nezu and his people can monitor inside. But before you cross it, I’m under orders to implant this.”
He pulled out a metal capsule. Inside was a black syringe that resembled a weapon more than a medical device. The first rays of dawn reflected coldly off its surface.
“It’s a tracker chip. State-of-the-art tech from Yaoyorozu Industries. It’ll record your every move, your meals, your dreams… even your shits. Virtually all your vitals. But that’s not all.”
From his coat, he retrieved a cylindrical detonator. A small touchscreen displayed changing numbers. A button waited silently on its side. Izuku couldn't help but assume the numbers matched their roster positions.
“If any of you rebel against the government, the Commission, or the world... this activates a very special poison.”
His tone never shifted. But the weight of his words struck like iron.
“It was developed in a Commission lab. Designed to destroy your immune system in seconds. Turns out every human has a genetic weak point. We identified yours.”
He raised the device slightly.
“When the chip is triggered and injects the poison, it’ll target that weak spot. The result will be fatal. In exactly four minutes… nothing can save you.”
Kishibe paused. Then smiled—coldly.
“With one click… goodbye.”
The air grew heavier. Izuku’s lips tightened.
“Why are you telling me this? Why now?”
Kishibe stared straight at him.
“Because I wanted you to know the truth before officially starting this life. Just like your classmates, I’m giving you a chance to run. If you flee now, I’ll play dumb. We stage a fight. You escape.”
He paused again.
“Sure, the government will put a bounty on your head. But you’d have a few years of peace. Maybe a family. A child. At least someone to cry at your funeral.”
Izuku stared at him in silence. There was no mockery in Kishibe’s face. Just that damned scar—always smiling, even when he couldn’t.
His mind raced with echoes. The trial. The blood. The hospital bed where his girlfriend had lain. His mother crying before the cameras.
And then… the memory of signing that contract. That damned deal Nezu offered, cloaked in salvation but reeking of hell.
There was only one conclusion.
“I already signed a deal with the devil,” Izuku said quietly. “The day I killed that son of the bitch, I stopped being innocent. And there’s a part of me that can’t help but believe…”
He drew a breath. Then said something he never imagined he would:
“I don’t regret what I did. I probably never will. I did what I had to do. And if that damned my soul to hell… so be it.”
Izuku bowed—clean and solemn. The traditional Japanese way.
“Thanks for offering me a way out. But I’ve made my choice. I chose this road. I chose to walk into hell.”
Kishibe laughed—this time, without mockery.
“Kids these days... diving into hell more willingly than we ever did. But I respect that. You’ve got balls, kid.”
Without another word, he stepped forward and readied the implantation kit. Izuku didn’t resist, offering his left arm.
“Hold still.”
The injection was deep, but clean. A sharp pain, brief and precise. The chip activated beneath his skin, blinking a cold shade of blue.
Kishibe handed him a medical patch to speed up the healing.
“You’re ours now, Midoriya. From this moment on, your ass belongs to the Commission… and to U.A. So behave. Don’t make me press this button.”
Izuku turned, the sting of the chip still pulsing beneath his skin. Kishibe was already walking away.
“Where are you going?” Izuku called out.
The agent paused for a moment, raising a hand as he climbed into one of the cars.
“You know how to drive, right? Think of it as your first test of independence. Good luck, kid.”
And just like that, he was gone. The entire convoy vanished with him.
Izuku was alone—facing the nameless road, the invisible dome, the gilded cage. He let out a quiet sigh, walked over to the vehicle loaded with his belongings, and, for the first time in his life, drove straight into hell.
(...)
The entire drive, Izuku remained silent, hands gripping the steering wheel with determination. The chip beneath his skin still pulsed with a persistent discomfort—a constant reminder that he was no longer free. On either side of the road, the trees began to close in, and the gravel under the tires loosened with every turn. There were no signs, no lights, no indication that they were approaching an “educational facility.” Just open fields, damp earth, and a sky torn between rain and clearing up.
After about ten minutes, the underbrush started to retreat, almost as if some invisible force was keeping it at bay. Then he saw it. His foot hit the brake instinctively.
In front of him stood a smooth, concrete wall reinforced with armor. Dark gray, lined with rivets the size of his fists and discreet towers camouflaged within the surrounding foliage. It wasn’t just a wall—it was a boundary. A warning. It didn’t look like a school; it looked like a maximum-security prison.
Only one entrance was visible. A black gate, adorned with a metallic "S" symbol in the center—polished and gleaming. And that “S,” at least to Izuku, didn’t feel like a welcome. It felt like a warning label. He knew exactly what they were being trained for.
Izuku swallowed hard, pushing down his anxiety. No one was visibly present, but he was certain they were being watched. That’s when he spotted it: an intercom mounted on a reinforced metal pole, encased in a secured box. A narrow slit served as the microphone. One button. Just one.
He pressed it.
A short buzz.
Click.
“Identify yourself.”
The voice was female—professional, firm, calm. Controlled.
Oddly enough, she sounded like someone who might offer you tea… or execute you with the same polite efficiency.
“Izuku Midoriya. New member of Class S. I’m here for the first time and bringing my belongings. I’m driving an official U.A. vehicle.”
There was no verbal response. Just another, longer buzz—then the low hiss of hydraulics engaging. The gate began to open.
He gripped the wheel tighter. Drove forward.
And then he saw it.
He looked around with a mix of expectation and caution, but nothing he had imagined came close to what now stood before him. This wasn’t a student dorm—not even by U.A.’s elite standards. It wasn’t a military base either.
It was a goddamn mansion.
No… it was a fucking palace.
Imposing. That was the word. The façade was symmetrical and luminous, with pale marble columns, high ceilings crowned by black domes, balconies adorned with wrought-iron filigree, and gardens so perfectly aligned they looked sculpted by a Greek goddess. The main building connected to other large structures on both the east and west sides, each sharing the same architectural elegance.
“I have to explore this place,” Izuku muttered to himself, without thinking.
There were also vast recreational areas—multiple bleachers seemingly designed for both sports and combat training. Ornamental fountains, classical statues, and flowerbeds arranged with meticulous care filled the rest of the sprawling estate. Even the birds flying overhead seemed trained not to disrupt the decor.
He stopped the car, his heart pounding in his throat.
Was this a trap? A mistake? Had he driven to the wrong address? Was this some twisted prank from Kishibe? Or had he died and arrived in the millionaire version of hell?
Was he really going to live here?
In the distance, near the main entrance, stood a figure. And then he saw her.
She wore a tailored black maid uniform with a long, form-fitting skirt, a refined corset, dark stockings, and a crisp white headpiece that contrasted sharply with her jet-black hair. Her posture was perfect—flawless, as if protocol were second nature. Her hair was tied back with surgical precision, her skin smooth and porcelain-pale, and her eyes reflected calculation rather than warmth. But what truly caught his attention… were her proportions. She was stunning.
And Izuku… nearly reverted to the stammering mess he’d been before ever having a girlfriend.
He parked awkwardly and jumped out quickly, trying to salvage whatever dignity Kishibe hadn’t already trampled on.
“Welcome, Mr. Midoriya,” she said with a flawless bow. “I am Yuri, head maid of the Class S facility. I’m responsible for domestic administration and attending to the needs of all resident members… including yours.”
Izuku swallowed hard. Blinked. His brain struggled to reconnect with language.
“N-nice to meet you… thank you…”
“Please, don’t waste time,” she interrupted, offering a faint smile—one that felt more polite than warm. “Allow me to assist you with your luggage.”
She stepped forward without waiting for permission. When she lifted Izuku’s heaviest box with one hand as if it were made of cardboard, he knew immediately—she had a powerful Quirk. The way her muscles moved, the precision of every gesture—it was more refined than anything he’d seen from a pro-hero.
“What kind of Quirk do you have?” he asked, the words slipping out before he could stop them.
“Enhanced strength. Muscular modification. Nothing impressive,” she replied without turning, as if carefully avoiding any hint of arrogance.
Then, still without glancing back, she added:
“First period starts in a few minutes. I suggest you hurry. The classroom is in the east wing of the building. If you get lost… the cameras will let me know.”
Izuku didn’t wait for another word. He ran.
Yuri was already walking toward the mansion with his things, calm and composed, while he bolted like the devil himself was chasing him.
He sprinted across the perfectly maintained stone gardens, passing fountains, statues, and plants that probably cost more than his entire childhood home. Near one of the paths, a small group of adult women—elegant, beautiful, some dressed in formal attire that suggested they were instructors—sat around a garden table sipping tea. One of them, lounging lazily on a tree branch, had long bicolor hair: dark blue with streaks of pink. She was reading a novel with a bright pink cover and seemed to be the only one not engaged in conversation. Her eyes briefly met his, and she smiled—mocking, amused.
“Poor boy. He has no idea what’s coming.”
Izuku ran faster.
By the time he reached the classroom in the east wing, he was panting, drenched in sweat, and his heart was hammering in his chest. He burst through the door without thinking.
“I’m sorry I’m late—!”
And then he froze.
His pupils dilated as if he had stepped through the wrong door and into a Milan fashion show by mistake. Nearly twenty girls turned to look at him from their desks. All of them beautiful. No—beyond beautiful. Staggeringly so. Their uniforms hugged their bodies in all the right places, their eyes sharp, some of them posed with effortless elegance. They looked like they had walked straight out of an idol magazine or the feed of some influencer with millions of followers.
And no. That wasn’t the worst part.
The worst part… was that there wasn’t a single other boy.
Not one.
His face turned crimson.
“Is… is this a classroom… or a damn romantic comedy harem straight out of a light novel?” he muttered under his breath.
His stupid comment earned a few laughs from some of the girls—those who had actually been paying attention to his arrival. Eventually, the horror, the sweat, the panic—it all caught up to him. This wasn’t what he was promised when he spoke to Nezu.
“Damn you, Nezu!” he shouted at the ceiling like a Greek hero cursed by the gods.
And that’s how Izuku Midoriya’s first day in Class S began.
To be continued.....
Notes:
Sorry for the delay with the update, hehe. I just wanted to mention that I’ve been wanting to include Yuri from Overlord in a Boku no Hero fanfic for a while now, and luckily, I already have a few ideas for her. I’d like her to be a character who supports the residents of Class S and, of course, I also want her to be part of the harem. I’ve more or less figured out how her relationship with Izuku could develop and how they might fall in love.
Finally, I apologize in advance for the grammatical errors. What do you think of the episode? I hope you enjoyed it.
UnderLava on Chapter 1 Sat 07 Jun 2025 11:53AM UTC
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