The city of Musutafu slept under the pale morning sun.
But beneath the calm streets, hidden tunnels carried whispers of rebellion.
A week had passed since the Hero Commission Raid on U.A.
The world now called it The Fracture Incident — the day a boy with a "forbidden Quirk" defied the Commission and vanished into thin air.
That boy was Koku.
Underground Shelter — Location Unknown
The air smelled of rust and oil. Old hero tech lined the walls — relics from the age of Deku.
Koku sat on a metal crate, staring at his hand. Blue-green lightning danced faintly across his fingers, flickering like sparks struggling to stay alive.
One For All… Chrono Breaker… two hearts beating inside the same body.
He clenched his fist — and the world seemed to vibrate.
In that instant, time slowed to half speed. The lightning brightened, tracing veins of light through his arm.
But then pain hit — hard.
The energy flared uncontrollably, bursting into the air and blowing apart several nearby boxes.
"Koku!" Aina rushed in, eyes wide. "You're going to kill yourself if you keep doing that!"
She grabbed his arm, forcing him to stop. The light faded, leaving only the sound of their heavy breathing.
Koku smiled faintly. "Still too unstable. It's like trying to control a storm inside a clock."
Aina crossed her arms. "Then stop training alone! You have friends now, remember?"
Rex appeared from the corridor, carrying an old training dummy. His expression was half-annoyed, half-impressed.
"Hard to forget when your training shakes the whole damn shelter."
He dropped the dummy in front of Koku. "If you're gonna blow something up, blow this instead."
Koku smirked slightly — a rare expression from him.
"Fair enough."
Training Session
Rex unleashed a wave of searing flame, while Koku dashed through the blaze — time half-frozen around him. Sparks of One For All boosted his speed beyond human sight, each step cracking the concrete beneath him.
Aina created glowing threads of light, weaving them into traps that forced Koku to react in real time.
"Too slow!" she shouted.
Koku vanished — reappearing behind her, stopping time for just a heartbeat. He could see every droplet of sweat, every flicker of light.
But then — One For All pulsed, amplifying his power unexpectedly.
Chrono Breaker: Five Seconds. One For All: 5% Output.
The collision of both quirks unleashed a shockwave that shook the entire underground.
Rex shielded his face. "You call that training?!"
Koku staggered, breathing heavily. "Yeah… controlled chaos."
Aina laughed breathlessly. "You're insane."
He looked at both of them — then smiled genuinely for the first time. "We all are. That's what makes us heroes."
Meanwhile — Hero Commission HQ
Director Kyra stood in a dark chamber lined with holographic screens. Each displayed news reports, satellite feeds, and time energy readings.
"Chrono anomalies are spreading," one agent reported. "Since the Fracture Incident, we've recorded temporal distortions across five cities."
Kyra's eyes narrowed.
"Find him. The boy carries One For All now. That makes him more than a threat — it makes him the last variable we can't control."
She turned toward the hologram beside her — a cloaked figure with glowing red eyes.
"And if we can't capture him?"
The voice on the hologram replied, distorted and deep.
"Then erase him. The Chrono Order will handle the rest."
Later That Night — The Old Train Station
The trio rested near an abandoned platform, sharing cold meals under flickering lamps.
The world above saw them as criminals, but down here — they were free.
Aina looked up at the cracked ceiling. "Do you think… we'll ever get to be heroes again?"
Rex scoffed. "We never stopped. The Commission just forgot what being a hero means."
Koku glanced at them both.
"We don't need titles. If people need saving… we'll save them."
He stood, pulling the old U.A. badge from his pocket. It was cracked — but he wore it anyway.
"This is our promise. We'll build something new — not under the Commission… but beyond it."
In the shadows, the old digital watch in his pocket began to tick again — for the first time since he'd arrived in this world.
Tick… tick… tick…
And with each beat, faint echoes of voices whispered from the past.
"Carry it forward…"
"The next generation begins now…"
Koku closed his eyes. Lightning sparked silently across his hand.
"The future's broken. So we'll rebuild it — second by second."