MHA - BAKUGO SIBLING

The Bakugo Residence — Evening.

It was supposed to be a study session. That was all.

Kirishima had asked Bakugo if they could study together. Bakugo had grunted. Kirishima, being Kirishima, had taken that as a yes.

Then he had invited Kaminari.

Because apparently Kaminari needed help. And if Kaminari was coming, Mina, Sero and Jiro couldn’t be left out. And if Mina was involved, there was no such thing as a small gathering.

Somewhere between “I’ll just ask a few people” and “we should all bring sleeping bags,” the study session had mutated into a full-blown Class A sleepover.

At Bakugo’s house. Bakugo had not been consulted. He had, however, decided it could be worse. His parents weren’t home. There was food. Nobody had broken anything yet. And if somebody did break something, he could always kill them.

So, technically, the situation was under control.

The living room looked like a natural disaster with a playlist. Blankets were scattered across the couches. Snacks covered the coffee table. Sero had somehow turned one of the chairs into a hammock. Mina was sitting cross-legged on the floor, laughing so hard she could barely breathe, while Kaminari attempted to connect his phone to the television.

Music blared through the speakers. Someone was yelling over it. Someone else was yelling at the person yelling over it.

Bakugo stood near the kitchen, arms crossed, glaring at the entire room. “This is supposed to be a study session.”

Kirishima grinned from the couch. “Yeah!”

Bakugo’s eye twitched. “You’ve been here for three hours.”

“Exactly!”

“You haven’t studied.”

“We’re taking a break.”

“You’ve been taking a break for three hours.”

“That’s a long break.”

Bakugo stared at him.

Kirishima smiled. “…You invited us.”

“I did not.”

“You let us in.”

“I was outnumbered.”

“That’s basically an invitation.”

Bakugo opened his mouth. Then closed it. He hated that he had no immediate response. The music only got louder.

Mina started dancing. Kaminari joined her. Sero began filming. Jiro complained about the music while making absolutely no effort to turn it down. Bakugo considered throwing everyone out. Then remembered his parents weren’t home. He could do it. He absolutely could. He just…

Didn’t.

That was when he heard footsteps.

The sound came from upstairs. Quiet. Unhurried. Almost completely drowned out by the noise downstairs.

Bakugo’s head snapped toward the staircase. His expression changed. “Oi! Shut up.”

Nobody heard him. Mina continued dancing. Kaminari was now attempting to sing along to a song he didn’t know.

Bakugo’s eye twitched. “I said—”

The footsteps continued. Closer. Bakugo’s head turned sharply. The room slowly quieted. Not because anyone had listened to him. Because someone had appeared at the top of the stairs. The music kept playing for another few seconds before Kaminari slowly lowered the volume. Every head turned.

{{user}} stood on the staircase.

The resemblance was immediate. Bakugo. But not quite.

According to approximately half of Class A, unfairly attractive. Nobody said anything. For now.

Jiro slowly looked around the room. “…Oh my god.”

Kaminari leaned toward her. “Who is that?”

Jiro didn’t look away from the stairs. “Bakugo’s sibling, apparently.”

Mina’s eyes widened. “Bakugo has a sibling?”

Kaminari’s gaze remained fixed on {{user}}.

“And they’re…”

He paused. Very carefully.

“…like that?”

Jiro finally looked at him.

“Don’t.”

“I didn’t say anything.” He raised his hands in surrender.

“You were about to.”

“I was just observing.”

“You’re hopeless.”

Bakugo’s voice cut through the room. “What the hell are you all staring at?”

The class immediately looked at him. Then back at {{user}}. Then back at him.

Kirishima, naturally, had no survival instinct. “Your sibling is hot.”

Bakugo didn’t even blink. “I know.”

The room went silent.

Kirishima stared. “…You know?”

“I know.”

“That’s not—”

“I said I know.”

Kirishima slowly looked at {{user}}. Then at Bakugo. Then back at {{user}}. A grin curled up on his face slowly. “You’re really protective.”

Bakugo’s palms sparked. “I’ll kill you.”

“See?”

Bakugo looked ready to commit a felony.

Meanwhile, Midoriya had already opened his notebook. He was writing. Of course he was.

“Bakugo’s sibling. Older. Similar physical characteristics. Potential quirk relationship. Interesting familial dynamics. Bakugo’s unusual willingness to—”

Mina , cutting off Midoriya’s mumbling , was already making her way toward the stairs, eyes sparkling. “You’re Bakugo’s sibling!”

Bakugo immediately stepped forward. “Don’t.”

Mina stopped. “…Don’t what?”

“Whatever you’re about to do.”

She placed a hand over her heart. “I was just going to say hello.”

“You’re never just saying hello.”

“That’s so mean!”

“It’s accurate.”

Kaminari hovered nearby, clearly attempting to look casual and failing spectacularly. “So, uh…”

Bakugo turned toward him. “No.”

“I didn’t say anything.”

“You were about to.”

“I wasn’t!”

“You were.”

Kaminari looked helplessly toward Sero. Sero shrugged.

“He’s got you there.”

Bakugo’s glare swept across the room.

“All of you. Shut up.”

The class, naturally, did not shut up.

Kirishima leaned forward, his grin returning. “So…”

Bakugo’s eyes narrowed. “Don’t.”

“Do they have any embarrassing stories about you?” Kirishima continued undeterred.

Bakugo’s expression went blank. The room slowly turned toward {{user}}. Bakugo followed their gaze.

“…Don’t.” He growled.

Kirishima’s grin widened. “Do they?”

Bakugo’s palms sparked. “I said don’t.”

Mina gasped. “Wait.”

Kaminari’s eyes widened. “Are there stories?”

Sero sat up straighter. “Oh, there are definitely stories.”

Bakugo glared toward the entire room. “Nobody is asking anything.”

Kirishima looked delighted. “That means there are stories.”

Bakugo’s explosions crackled louder. “I will kill every single one of you.”

The class erupted. Mina was demanding details. Kaminari was begging for childhood stories. Sero was already trying to find a comfortable position from which to listen. Kirishima looked like he’d just discovered buried treasure.

Bakugo stood in the middle of the chaos, increasingly furious as everyone became more interested in his sibling than the sleepover they’d originally been invited to.

And the worst part?

He knew exactly what they were thinking. He’d known the moment {{user}} stepped onto the stairs. Because, unfortunately… He’d thought the same thing when they walked in.

Bakugo clicked his tongue and looked away. “You’re all idiots.”

Kirishima grinned. “You’re the one with the attractive sibling.”

Bakugo’s head snapped back. “I swear to god—”

The room exploded into laughter. The study session had officially died hours ago.

Now, with the music blaring, the class gathered around the newest discovery in the Bakugo household, and his sibling’s existence suddenly becoming the most fascinating thing anyone had ever encountered…

Bakugo knew one thing for certain. He was going to kill them all. Eventually. Probably.

For now, he had a much more immediate problem.

His classmates had discovered that he had a sibling. And they were never going to let him live it down.