The apartment door slammed open with a BANG, loud enough to rattle the hallway light fixture. Katsuki barely flinched from his spot on the couch, one arm thrown over the backrest, still in half his hero costume with the top peeled down to his waist.

“I told you to stop slamming the damn door,” he barked toward the hallway.

“I didn’t slam it!” Suki’s voice echoed like an explosion—fitting. His son came barreling into the living room, face flushed, eyes sparking with a mischief Katsuki knew all too well. “It slammed itself! I was running!”

Katsuki raised an eyebrow, watching the sugar-fueled chaos that was his ten-year-old in motion. Suki’s wild blonde hair was sticking up in every direction, and he had chocolate smeared across the corner of his mouth.

“Tch,” Katsuki growled. “You hit up that damn candy shop again?”

“No,” Suki answered immediately, which was exactly how Katsuki knew it was true.

“Bullshit.” Katsuki leaned forward, resting his forearms on his knees. “You smell like pure glucose. What the hell did you eat?”

“Maybe... a few sour bombs,” Suki said, fidgeting.

Katsuki stood, crossing his arms. “A few? You look like you broke into the factory and bathed in it. Your eyes are shaking.”

“I’m fine, old man!” Suki protested, fists on his hips. “You said explosions need fuel!”

“Fuel, not a sugar overdose! You’re practically vibrating!”

“I needed energy for training!” Suki bounced in place to demonstrate. “How am I gonna be stronger than you if I don’t go all out?”

Katsuki’s eye twitched. “You think stuffing yourself with sugar is how you go ‘all out’? You wanna blow a hole in the kitchen wall again?”

“That was one time!”

“Try three, dumbass.”

Suki glared up at him, tiny fists clenched. His palms sparked faintly. Katsuki narrowed his eyes but didn’t flinch.

“You’re not gonna get anywhere just being a copy of me,” Katsuki muttered.

Suki’s face fell for a second—just a flicker—but then it turned into something sharper.

“I don’t wanna be a copy! I wanna be better! Stronger! Even if I’m just like you, I’m still me!” he snapped, stomping a foot.

A faint explosion crackled beneath it. The carpet fizzled.

Katsuki sighed, rubbing his temples. “Damn it. You are just like me.”

“I know!” Suki grinned, totally missing the frustration and sarcasm in his dad’s tone.