Honnouji Academy - Courtyard
The dust settled from Y/N's landing. He stood between Mako and the fully restored All For One.
(Y/N): Gamagoori! Take Mako and destroy the transmitter! I'm taking this trash out!
Gamagoori: Understood! DO NOT DIE, (L/N)!
Gamagoori grabbed Mako and sprinted toward the tower.
AFO: Sighs You are a persistent insect. I suppose I have time to crush you before the Original Life Fiber finishes its meal.
(Y/N): Time? Smirks Buddy, time is the one thing you don't have.
BOOM.
Y/N didn't run. He detonated his sweat with such force that he vanished from sight, launching himself kilometers into the sky, dragging AFO with him.
Meanwhile - The Skies Above
Ryuko and Satsuki were engaging Ragyo.
Inumuta: (Radio) Lady Satsuki! Matoi! I am patching a feed to your HUDs! You need to see this!
A holographic screen opened. It showed a blur of golden light and black shadows tearing through the city limits of Honno City.
Satsuki: Is that... Y/N?
Inumuta: His speed... it's hypersonic. He's not just fighting; he's hunting.
Ryuko: Kick his ass, Y/N!
The Fight - Outskirts of Honno City
(Y/N) was a golden comet. He blasted himself off skyscrapers, turning in mid-air to unleash barrage after barrage.
(Y/N): CLUSTER!
Explosions surrounded AFO from every angle.
AFO: Air Cannon!
AFO fired back, but Y/N twisted through the air, dodging by millimeters. He slammed his gauntlets into AFO's chest.
BOOM!
AFO was sent crashing through three consecutive buildings. He stood up, coughing. But something was wrong. His voice was lighter. His mask felt loose.
AFO: What... is this sensation?
(Y/N) landed on a streetlight, panting, smoke rising from his skin.
(Y/N): Feeling spry, old man? Or should I say... young man?
AFO looked at his hands. They were unwrinkled.
AFO: The Rewind... the energy feedback... you're accelerating it!
(Y/N): HOWITZER IMPACT!
Y/N spun like a tornado and slammed into him again.
The Transformation
AFO was flung back into the Academy grounds. He was now a teenager. Panic set in.
AFO: NO! I WILL NOT FADE AWAY! ULTIMATE COMBINATION!
Dark energy and flesh erupted from AFO's back. He transformed into a grotesque, massive mountain of mouths, rivets, and raw power. He lunged at Y/N, a mouth the size of a bus trying to swallow him.
(Y/N): UGLY!
Y/N blasted himself backward, flying across the entire campus. AFO chased him, tearing up the ground.
(Y/N): Strafe Panzer!
Y/N unleashed a machine-gun volley of explosions. Each hit chipped away at the monster. Each hit made AFO smaller.
Teenager... Child... Toddler...
(Y/N): FINAL... DISTINCTIVE...
Y/N gathered every drop of sweat, every ounce of pain, into his right arm. He spun, creating a vacuum of air that pulled the grotesque AFO into the center.
(Y/N): HOWITZER IMPACT: CLUSTER!!!!!!!
KA-BOOOOOOOOOOOOOOOOOOM!
The explosion dwarfed the academy tower. The shockwave cleared the clouds for miles.
AFO was launched like a ragdoll into the ruins of a dormitory building.
The Erasure
The smoke cleared. Y/N landed, stumbling. He coughed violently, blood splattering the ground. His vision was swimming.
In the rubble, there was no monster. There was only a Baby.
Baby AFO sat there, glowing with unstable energy. He couldn't speak. He could only gurgle in rage.
(Y/N): Wheeze... Cough... It's over...
Y/N took a step forward, but his legs gave out. He fell to his knees. He was running on fumes.
Baby AFO saw the opening. His eyes glowed with malice.
ZWEET.
A singular, hardened blood-spike shot out from the baby's back. It aimed directly for Y/N's forehead.
To the Elite Four and Inumuta watching the feed, it looked like it pierced Y/N's skull.
Ryuko: Y/N!!!!!!
Snap.
The camera zoomed in. The spike hadn't hit.
Y/N had caught it. Two fingers, right between his eyes. His speed, even at death's door, was impossible.
(Y/N): ...Nice try... brat.
Y/N leaned forward. He couldn't lift his arms anymore. They were broken. So he opened his mouth. Sparks gathered in his throat.
(Y/N): Die.
BOOM.
A focused, concentrated explosion erupted from Y/N's mouth. It engulfed the baby completely.
There was no scream. The cells of All For One simply disintegrated, de-aging past the point of existence. He was erased.
The Victory
Y/N stood up, swaying.
He looked at the empty spot where the Demon Lord used to be.
Slowly, painfully, Y/N raised his right fist toward the sky.
(Y/N): ...I... won.
His eyes rolled back. He fell backward, hitting the ground hard.
But his arm remained raised. Pointing to the heavens. The sign of a true Victor.
Moments Later
The battle with Ragyo ended (as per the anime events). Ryuko and Satsuki rushed to the ruined dormitory sector.
Ryuko: Y/N!!!!
They found him lying on his back, his fist still raised in the air.
Satsuki: MEDIC! BARAZO!
Barazo and Iori rushed in. Barazo checked the arm that was raised. He gently lowered it. It crunched.
Barazo: ...The bone is dust. The nerves are vaporized.
Ryuko: Can you fix it!?
Barazo: I can restructure the flesh... but this arm? It's done. He might never use his quirk through this limb again. Even with years of rehab, it's just dead weight.
(Y/N) groaned, his eyes cracking open just a slit.
(Y/N): Weakly ...Did I... get him?
Ryuko: Crying Yeah! You got him! You erased him!
(Y/N): Smiles faintly ...Bring on... the rehab... I'm not... done yet...
Barazo: Sighs Stubborn kid. Forget the arm. Your heart is the problem. It's beating, but it's fragile. If you push it again... you die. For real.
(Y/N): ...Copy that... Doc...
Y/N passed out, a peaceful look on his face.
Four Days Later
The Ruins of Honnouji Academy - Relief Tent
Sunlight filtered through the white tent. Y/N lay in a hospital bed. His right arm was heavily casted and strapped to his chest. His heart monitor beeped steadily.
(Y/N): ...Ugh.
Sukuyo: He's awake!
The tent flap flew open. The whole gang piled in—Mako, the Elite Four, Aikuro, Tsumugu.
Sukuyo: Eat! You're skin and bones!
She piled croquettes onto his tray.
(Y/N): Weakly Thanks... Munch Still the best.
Satsuki entered, looking regal even with bandages on her cheek.
Satsuki: Ragyo is dead. All For One is erased. The Life Fibers are dormant. We have won.
(Y/N): Good. Looks at Ryuko
Ryuko was standing by the bed, looking at her feet. She looked nervous. That was new.
(Y/N): Ryuko? You okay?
Ryuko took a deep breath. She stepped forward.
Ryuko: Everyone, get out.
Mako: Eh? But I want to-
Ryuko: OUT! Give us a minute!
Satsuki signaled the others. They filed out, grinning.
(Y/N): Am I in trouble? 0_0
Ryuko: Shut up.
Ryuko grabbed his hospital gown collar with her left hand. Her face was bright red.
Ryuko: You... you promised you wouldn't die.
(Y/N): I kept the promise. Mostly.
Ryuko: You stupid, reckless, amazing idiot.
She leaned down and kissed him. It wasn't a "heat of battle" kiss. It was soft, lingering, and full of genuine love.
(Y/N): Eyes wide ...Oh.
Ryuko pulled back, her forehead resting against his.
Ryuko: I love you, Y/N. I don't care about your arm. I don't care about your heart condition. I'm sticking with you. So you better get used to it.
(Y/N): Blushing ...I love you too, Ryuko.
Ryuko smiled, the brightest smile he'd ever seen on her.
Outside the tent, Mako cheered.
Mako: THEY KISSED!
Satsuki stood outside, listening. She smiled, just a little. She didn't barge in. She didn't argue. She simply walked away to oversee the reconstruction.
(Y/N): Internal Finally... peace.
Ryuko: So, when you get out of here, we're going on a date. A real one. No fighting.
(Y/N): Sounds... incomprehensibly good.