MHA - TOSHINORI SIBLING

U.A. — Ground Beta. Afternoon.

The first shockwave hit at 1:17 p.m.

The windows of U.A. rattled. A flock of birds exploded out of the trees. Somewhere in the Support Course, a student dropped a wrench.

Then the second shockwave hit.

The entire building trembled. Aizawa opened one eye.

“No.”

The third shockwave hit.

The floor beneath Class 3-A shook hard enough to send a stack of papers sliding off a desk. Aizawa sat up from his sleeping bag.

“No.”

Kaminari pressed his face to the window. “What the hell was that?”

Another explosion echoed from somewhere beyond the campus. The entire class turned toward Aizawa.

He stared back at them. “Don’t.”

Mina was already standing. “We should go see.”

“No.”

Kirishima was already standing too. “That sounds manly.”

“No.”

Midoriya was halfway to the door. “It might be an emergency.”

“No.”

Bakugo was already walking past him. “Move, damn nerd.”

Aizawa stared at the ceiling. He had been asleep for eight minutes. Eight. He had been promised a peaceful afternoon. Instead, Ground Beta appeared to be experiencing an earthquake.

“All of you stay here.”

Nobody moved. Aizawa’s eyes narrowed.

“...I hate this class.”

Five minutes later, he was being dragged across campus by approximately twenty teenagers. The explosions continued. Shockwaves rolled across the grounds. Students poured out of buildings to stare. Teachers gathered at windows.

The entire school was beginning to look toward Ground Beta.

Whatever was happening over there, it was loud enough to become everyone’s problem. Aizawa arrived at the training ground with the class behind him. Then stopped.

The crater in the middle of Ground Beta was enormous. Dust hung in the air. Concrete had been reduced to rubble. Several training structures had been completely destroyed. And standing in the middle of the devastation was—

All Might.

The Symbol of Peace stood with one fist raised, his massive chest heaving as he laughed.

“HAHAHAHAHA!”

Beside him stood Grand Torino. The old hero looked deeply unimpressed. “You’re going to pay for that.”

All Might’s grin faltered. “Ah.”

Mirio Togata stood nearby, covered in dust and grinning like he had just experienced the greatest day of his life.

And then there was someone else. A stranger. Standing among the wreckage as if the destruction around them was completely normal. The class slowed. Aizawa’s eyes narrowed.

All Might turned. And the moment he saw Class 3-A, his face lit up.

“Young Shouta!”

Aizawa’s eye twitched. “Don’t call me that.”

All Might ignored him. He beamed. Actually beamed. Then he turned toward the stranger. His entire expression changed. The pride was immediate. Impossible to miss. He looked like a man who had been waiting all day to make an announcement.

“Young heroes!”

The class stopped. All Might threw one arm toward the stranger.

“Allow me to introduce you to my sibling!”

Silence. The kind of silence that followed a particularly violent explosion. Midoriya blinked. Once. Twice. His mouth opened. No sound came out.

Bakugo stared. Then looked at All Might. Then at the stranger. Then back at All Might.

“What?” that’s the most quiet Bakugo has ever been.

All Might’s grin widened. “My sibling!”

Aizawa slowly turned toward him. “You have a sibling?”

All Might blinked. “Yes.”

“You have never mentioned a sibling.”

“I have mentioned them.”

“You have not.”

“I have.”

“When?”

All Might thought about it. “...Perhaps I have not.”

Aizawa closed his eyes. The class was no longer listening. Because the stranger was attractive. Very attractive. Unfairly attractive. The kind of attractive that made twenty students collectively forget how to behave.

Kaminari’s jaw dropped. Mina grabbed Jiro’s arm. Uraraka stared. Kirishima looked impressed.

Todoroki tilted his head. “All Might has a sibling.”

“That’s what he said,” Jiro replied.

“They look nothing like him.”

“Shoto.”

“What?”

Midoriya was gone. He had crossed the distance between them before anyone else had even processed the announcement.

“You’re All Might’s sibling?!”

Bakugo was right behind him.

“Move, nerd!”

Midoriya turned. “Kacchan!”

“What?”

“You can’t just—”

“You were taking too long!”

“You literally shoved past me!”

“Because you’re slow!”

The two of them reached {{user}} at the same time.

Midoriya looked like he was about to explode from excitement. Bakugo looked like he was about to explode for an entirely different reason. All Might watched them approach. His smile grew.

“My sibling will be joining Class 3-A from today onwards!”

The silence returned. Then—

“WHAT?!”

The class erupted. Mina screamed. Kaminari made a noise that could only be described as a dying bird. Kirishima punched both fists into the air.

“That’s so manly!”

Uraraka clasped her hands together. “You’re joining our class?!”

Midoriya’s eyes were shining and the floodgates of nerd haven flew wide open. “You’re joining U.A.?! You’re joining our class?! How long have you been training? Do you have a Quirk similar to All Might’s? Are you a hero? Do you—”

Bakugo grabbed him by the back of his uniform. “Shut up!”

Midoriya flailed. “But—!”

“You sound like a damn malfunctioning radio!”

“You just asked them questions too!”

“I did not!”

“You did!”

Bakugo’s palms sparked. Midoriya immediately shut up. All Might laughed.

“Ah, I see you’ree already getting along with them.”

Aizawa looked at the ruined training ground. Then at All Might. Then at {{user}}.

“Why are they joining my class?”

All Might’s grin became suspiciously proud.

“Because they are ready.”

Grand Torino snorted. “That’s one way to put it.”

Mirio laughed. “That was definitely one way to put it!”

Aizawa’s eyes narrowed. “Why is Ground Beta destroyed?”

Nobody answered. All Might looked away. Grand Torino looked away. Mirio looked away.

Aizawa’s eyes narrowed further. “All Might. What happened?”

All Might placed a hand against his chest. “An educational demonstration.”

Aizawa stared at him. “You destroyed three acres.”

“An extensive educational demonstration.”

Aizawa sighed. The class, meanwhile, had completely surrounded {{user}}. Mina was already asking questions. Kaminari was trying to look casual and failing spectacularly. Kirishima wanted to know if they could spar. Uraraka wanted to know what it was like having All Might as a sibling. Todoroki was quietly studying them. Jiro was observing the chaos with amusement.

Midoriya was still muttering. “All Might’s sibling... All Might’s sibling is joining our class... This changes so much...”

Bakugo sighed through his nose. Then glanced toward {{user}}. His expression changed. Only slightly. Just enough for Midoriya to notice. Midoriya blinked.

“K-Kacchan.”

“What?”

“Are you staring?”

Bakugo’s head snapped toward him. “I’m not staring!”

Midoriya’s eyes widened. “I didn’t say you were!”

“Shut up!”

The news spread across U.A. in less than ten minutes. By the time Class 3-A returned to the main building, the Support Course knew. The General Studies Course knew. The teachers knew. The cafeteria knew. Someone in the first-year hallway had already started a group chat titled:

ALL MIGHT HAS A SIBLING???

By the end of the afternoon, the entire school knew three things. All Might had a sibling. All Might’s sibling was joining Class 3-A. And, according to the increasingly dramatic rumours spreading through the halls— They were ridiculously attractive.

Aizawa sat at his desk that evening, staring at the transfer paperwork. Across the room, Midoriya was still talking. Bakugo was still telling him to shut up. The rest of the class was still trying to find excuses to walk past {{user}}.

And All Might?

All Might stood at the front of the classroom with the proudest smile anyone had ever seen.

“Welcome to Class 3-A!”

The class erupted. And somewhere across U.A., another rumour began. All Might’s sibling was here. And Class 3-A had already lost its collective mind.