Chapter Text
The chalk snapped.
Aizawa paused mid-sentence, white dust scattering across the blackboard as a jagged line cut through the kanji he’d been writing. His eyes flicked down to the broken chalk, then slowly lifted toward the class.
“…Tch.”
Around him, Class 1-A sat half-awake, half-restless. Kaminari was slouched dangerously close to sleep. Uraraka was taking neat notes. Todoroki stared straight ahead, unreadable as ever.
Katsuki was already scowling.
Midoriya Izuku, meanwhile, had stopped writing altogether.
He didn’t know why there was no alarm, no villain warning, no visible threat but something crawled up his spine anyway. The air felt… tight. Pressurized. Like the moment right before a storm cracked open. His fingers curled around his pen,then the lights flickered.
Once...twice...
“What the-It wasn't me i swear!” Denki said imediately.The temperature in the room dropped sharply, like someone had opened a door to winter. The ceiling groaned actually groaned and a low, distorted hum vibrated through the classroom, rattling desks and windows alike.
Katsukishot to his feet. “Oi-!”
The ceiling split.
It tore.
A swirling mass of violet light ripped open above them, edges warping and folding in on themselves like reality had forgotten how to exist properly. The portal pulsed, unstable, leaking dark energy that made the air taste metallic.
Izuku’s breath caught ‘This-this is a quirk,’ his mind screamed. ‘Some kind of spatial ?’
“Everyone, DOWN!” Aizawa barked, activating his capture weapon in one fluid motion. It was too late,two bodies fell from the portal they dropped hard.
The first hit the floor shoulder-first and moved instantly, twisting mid-impact with reflexive precision. A blast exploded from his palm not toward the students, but outward, cushioning the fall, redirecting debris, shielding the second body as it slammed down seconds later.The explosion echoed like thunder as smoke filled the room.
Desks screeched as students scrambled back, chaos erupting all at once.
“What just fell out of the CEILING?!”
“Is that a villain?!”
“Bakugou, don’t!” Katsuki didn’t hear them as he was staring as the smoke thinned, two figures came into view both were taller and...Older ?
One lay half-kneeling, one hand braced against the floor, chest heaving as sparks cracked weakly around his fingers. His costume was scorched and torn black and orange armor built for combat, not training. His spiky blond hair was longer, wilder, streaked with ash.
And his eyes
Katsuki’s stomach dropped 'Those are my eyes.'
The second figure lay on his back, breathing shallow but steady. Green curls spilled messily across the floor, darker than Izuku remembered his own being. His suit was battered, reinforced with unfamiliar tech, the mask cracked at the edges. Old scars traced his arms, some thin, some brutal.
Blood trickled from his temple. Izuku took one step forward before he even realized he’d moved “That’s…me?” he whispered.
The kneeling blond swore under his breath. “Damn it”. His voice was deeper and kind of familiar.
Before anyone could react, the blond twisted, grabbing the green-haired hero by the collar and hauling him closer, shielding him with his own body as if expecting another attack.
“Oi. Deku. Stay with me,” he snapped, sharp and urgent. “Don’t you dare pass out now, you idiot.” The green-haired hero groaned faintly, eyelids fluttering. “…Kacchan ?”
The room went dead silent. Katsuki felt like the floor had vanished beneath him.
That voice was older sounding very tired but undeniably his
Aizawa stepped forward, eyes glowing red. “Don’t move,” he ordered, capture weapon snapping tight around the blond’s arm in an instant.
The older Bakugou froze not in fear, but calculation. His gaze flicked to the binding, then to Aizawa, sharp and assessing.
“…So this is how far in the past the damn villain can send someone” he muttered.
Aizawa narrowed his eyes. “Explain. Now.”
The blond huffed a breathless, humorless laugh. “Yeah yeah calm down Aizawa. Figures.” Aizawa stared in shock at the use of his name from a look alike problem child. Older Bakugo's grip on the green-haired hero tightened just slightly protective, instinctive.
Then his gaze lifted and locked directly onto him, sixteen years old, standing frozen beside his desk.
For half a second something raw and unguarded flashed across the older Katsuki’s face, shock, recognition.
…Regret
“…Tch,” he clicked his tongue, looking away. “You’re loud as hell, huh. Figures.”
Katsuki couldn’t breathe.
Izuku…past Izuku was shaking now, staring between the two older heroes, eyes wide and shining. “Sensei…” he whispered. “I-I think…”
Deku, on the floor stirred again, coughing softly. His eyes opened, sharp, aware, impossibly gentle as they swept the room.
They landed on his past self, On his- or rather his past self’s Kacchan.
His lips curved into the faintest, exhausted smile. “…Oh,” he murmured. “So we really did go back.”
The purple portal above them shrieked once more then snapped shut like it had never existed.
“You can finally speak, huh...damn nerd.” Dynamight said it like an insult out of habit, but the edge wasn’t there. His voice cracked just enough to betray the way his shoulders loosened when Izuku’s eyes fully focused, green sharpening with awareness.
Deku coughed once, then smiled, small, tired, real. “Wow,” he murmured. “First thing you say after almost losing me to spacetime is still an insult.”
“Don’t get cocky,” Dynamight snapped, but his hand didn’t move from where it was braced protectively near Deku’s shoulder. “You scared the hell outta me.”
Katsuki’s brain short-circuited.
scared?
Aizawa cleared his throat sharply.
“That’s enough,” he said, capture weapon still tense but no longer tightening. “Both of you. Start explaining. Slowly. From the beginning.”
Both of them exchanged a look a silent Interaction
A way of communicating that they have used for years now the kind of look that said your turn without words.
Deku sighed and carefully pushed himself into a sitting position, wincing as Dynamight steadied him with practiced ease.
“…Okay,” Deku said. “We’ll explain. But first...this is going to sound unbelievable.”
“You’re standing in my classroom after falling out of a portal,” Aizawa deadpanned. “You’ve got my attention.”
Deku nodded. “In our time,” he began, “Kac- Dynamight and I run a joint agency.”
The room erupted instantly.
“JOINT?!”
“WAIT BAKUGOU AND MIDORIYA?!”
“YOU TWO DON’T EVEN SIT NEXT TO EACH OTHER”
“QUIET,” Aizawa barked, silencing them in an instant.
Katsuki felt dizzy.
A joint agency? With Deku?
Dynamight scoffed. “Oi, don’t act so shocked. We’re efficient.”
Izuku smiled faintly. "It’s called Win For All.”
That did it.
Katsuki’’s heart slammed violently against his ribs.
Deku continued before anyone could interrupt again.
“We were at the agency earlier today doing paperwork, actually.”
Katsuki groaned. “Don’t remind me.”
.
.
.
.
.
.
2 Hours earlier in the future
Sunlight poured through wide reinforced windows, glinting off polished floors scarred with old battle marks. The walls were lined with framed rescue reports, headlines, and team photos.Heroes standing shoulder to shoulder, battle-worn but smiling.
At the center of it all
Dynamight was slumped over his desk, scowling at a tablet like it had personally offended him.
“Why the hell do we need this many forms for collateral damage?” he snarled. “I saved the damn block.” Deku sat across from him, sleeves rolled up, quietly organizing reports with practiced efficiency. “Kacchan,” he said gently, “you leveled the block.”
“It was a controlled explosion.”
“You blew up a parking structure.”
“CONTROLLED.”
Deku hid his smile behind his coffee mug.
That’s when the alert went off.
A sharp, distorted chime echoed through the agency priority red.
Deku’s expression shifted instantly. Calm to focused in half a second. “Multiple hero signals,” he said, scanning the incoming data. “They’re calling for backup.”
Dynamight was already on his feet, gauntlets snapping into place.“Tch. Finally.”
The message cut through the speakers, strained with static. “All available pro heroes this is Edgeshot. We’re engaging a hostile with an unknown quirk. Reality distortion suspected. We need immediate assistance.”Deku’s fingers tightened. “Reality distortion…” he murmured. “That’s dangerous.”
“Then let’s end it fast,” Katsuki replied, already heading for the exit. “You coming or what?”
Deku didn’t hesitate.
He never did.
.
.
.
.
Presently
“We arrived on-site with several other pros,” Deku explained. “At first, the villain didn’t seem strong.”
Dynamight clicked his tongue. “That was the trap.”
Deku nodded.
“They could bend space,” he continued, voice steady but eyes darkening. “Fold distance. Redirect attacks. And when we pushed them into a corner…”
“…they panicked,” Dynamight finished.
“And their quirk evolved,” Deku said quietly. “Or maybe… broke.”
The classroom was dead silent now.
“Their ability wasn’t just space manipulation,” Dynamight said. “It was temporal displacement. They didn’t know how to control it.”
Deku looked down at his hands.
“The moment it activated, everything started tearing apart. Buildings, streets, time itself was destabilizing.”
Katsuki’s jaw clenched.
“I grabbed Deku. Didn’t think. Just knew I wasn’t letting him get pulled away.”
Deku glanced at him, eyes soft.
“And I wasn’t letting go.”
Aizawa exhaled slowly.
“And that sent you here.”
Deku nodded. “Yes. To this point in time.”
Izuku swallowed hard. “S-so… you’re really-”
“From the future,” Deku confirmed gently, meeting his younger self’s gaze. “And we didn’t mean to change anything.”
Future Katsuki’s eyes flicked briefly to his past self, sharp, unreadable.
“…But looks like we did anyway.”
Aizawa sighs “This is gonna be a long day..”