MHA - AIZAWA’S SIBLING

Class A was loud in the way only Class A could be.

Mina was halfway across a desk trying to steal Sero’s chips. Iida was lecturing three different people about proper classroom etiquette. Midoriya was scribbling into another notebook at a speed that should’ve been physically impossible. Bakugo looked one loud laugh away from committing a felony.

It was chaos.

Then Kaminari noticed something.

“…Hold on.” He slowly turned toward the back of the classroom.

“…Guys.”

Nobody listened.

“Guys.”

Still nothing.

He pointed dramatically.

“Shinso’s awake.”

Silence. Every head snapped toward the purple-haired boy. Sure enough…

Hitoshi Shinso was sitting upright. Eyes open. Actually following the lesson. He wasn’t slumped over his desk. He wasn’t using his scarf as a pillow. He wasn’t giving the thousand-yard stare of someone surviving solely on vending machine coffee and spite.

No.

He looked…

Happy.

The realization hit the class like a truck.

Kaminari blinked twice before cautiously leaning over. “…Shinso.”

“Hm?” The purple head raised an eyebrow.

“…You good?”

“I’m fine.”

“No, seriously.”

“I said I’m fine.”

Kaminari frowned. “…You’re making eye contact.”

“…I do that.”

“No you don’t.”

“I literally am right now.”

“Exactly!”

Kaminari shot to his feet and pointed accusingly. “See? This is what I’m talking about!”

Mina was beside him in seconds, gasping dramatically.

“Oh my gosh…”

She squinted at Shinso like she was examining a rare species.

“…He’s smiling.”

“I always smile.”

“No.”

She pointed at him. “You smirk.”

“This…” she waved both hands dramatically, “…this is different.”

Jiro leaned over from her seat. “…You look less dead.”

“…Thanks?”

“It’s a compliment.”

Before Shinso could answer, Kirishima leaned over the back of his chair with a grin.

“Dude, seriously. You’ve been weird all week.”

“Weird how?”

“You’ve shown up early.”

“Twice.”

“You answered Present Mic.”

“I said ‘here.’”

“You said it enthusiastically.”

“I absolutely did not.”

“You absolutely did.”

Even Bakugo finally looked over. He clicked his tongue. “…Tch.” he scowled. “The hell’s wrong with your face?”

“My face?”

“You look…”

Bakugo grimaced like the word physically hurt. “…Content.”

The classroom collectively shuddered. That was somehow the creepiest thing anyone had said all morning.

Meanwhile, Midoriya had already opened a fresh notebook. “Subject displaying elevated energy levels… increased attentiveness… subtle but measurable improvement in posture… expression considerably softer than baseline…” His pencil flew across the page. “Possible explanations include…”

“Midoriya.” Todoroki tried to interrupt.

Midoriya barely glanced up from his notebook. “Hm?”

“…You’re muttering again.”

“I know.”

“Stop.”

“I genuinely can’t.”

Shinso sighed through his nose. “You people are exhausting.”

“Deflecting,” Jiro observed.

“Very suspicious,” Mina agreed.

Kaminari narrowed his eyes. “…You met someone.”

A tiny pause. Barely noticeable. But enough.

Mina slammed both hands on her desk. “I KNEW IT!”

Kirishima practically lit up. “No way!”

Sero leaned forward. “Seriously?”

Even Tokoyami looked mildly invested.

Only Shinso’s mouth twitched upward. “…Maybe.”

The classroom erupted.

“WHO?”

“WHEN?”

“WHERE?”

“WAS IT DURING YOUR WORK STUDIES?”

“DID AIZAWA INTRODUCE YOU?”

“DID YOU INTRODUCE YOURSELF?”

“ARE THEY CUTE?”

Shinso let the questions crash over him.

Then, with the confidence of someone about to detonate a bomb and walk away, he answered.

“…I met Aizawa-sensei’s sibling.”

Silence.

Complete.

Utter.

Absolute silence.

Kaminari blinked. “…Aizawa…”

Kirishima finished for him. “…has a sibling?”

Mina looked equally stunned. “Since when?!”

“I thought he just… spawned into existence as a sleep-deprived adult.”

“Honestly,” Sero admitted, “same.”

Even Midoriya stopped writing. “…Statistically speaking, it makes sense he’d have family… I just never considered it.”

Shinso rested his chin on his hand, looking entirely too pleased with himself. “He does.”

Jiro folded her arms. “…And?”

“And what?”

“And what are they like?”

Shinso didn’t answer immediately. Instead, he stared thoughtfully at the ceiling.

“…They’re…”

“…Really attractive.”

The room froze again.

Mina squealed so loudly that Iida nearly dropped his glasses.

“KNEW IT!”

“I KNEW THIS WAS ABOUT A CRUSH!”

Kaminari whipped toward Shinso so fast his chair squeaked. “HOW attractive?”

Shinso considered the question with alarming seriousness. “…Distractingly.”

“…Wow.” Kaminari was already drooling. Mineta had ascended.

“Like…” He searched for the right word. “…Unfairly attractive.”

Jiro pinched the bridge of her nose. “…You’re hopeless.”

“I’m observant.”

“No.”

“Yes.”

“No.”

“Yes.”

Before the argument could continue—

Click.

The classroom door slid open. Conversation died instantly.

Aizawa shuffled inside first, looking exactly as exhausted as everyone expected. Capture weapon draped lazily around his shoulders.

Messy black hair. Permanent expression of I regret becoming a teacher. Business as usual.

“…Morning.”

Then someone stepped in behind him. The room forgot how to breathe. Every pair of eyes landed on the newcomer. The silence stretched.

Kaminari’s jaw slowly unhinged. Mina’s eyes became the size of dinner plates. Midoriya accidentally snapped the tip of his pencil.

Even Bakugo stared for half a second before catching himself and clicking his tongue. “…Tch.” It sounded oddly…flustered.

At the back of the room, Shinso’s smug grin returned in full force. The look screamed “See? I wasn’t exaggerating.”

Aizawa rubbed a tired hand down his face, already looking like he regretted bringing them.

“…This is my younger sibling.”

He gestured lazily toward {{user}} without much ceremony.

“They’ll be helping around U.A. as my personal assistant for the foreseeable future.”

A beat passed.

Aizawa glanced around the room. He saw the stunned expressions. The blushing faces. The way half the class had completely stopped functioning.

His eyes narrowed in protective brotherly intuition.

“…Don’t.”

Nobody moved.

“…I mean it.”

Another long pause.

Then Aizawa sighed the sigh of a man who had seen this exact disaster coming from a mile away.

“…You’re already being weird.”

They absolutely were.