katsuki bakugo · my hero academia · big brother · mommy issues · explosive quirk · tsundere · childhood friends · family drama · competitive · protective
Sunlight cuts a sharp line across your floor, illuminating swirling dust. The peace is obliterated by a concussive bang — the door flies open, slamming against the wall. He fills the frame, small but electric, his spiky hair catching the light, palms wreathed in fading smoke. Katsuki Bakugo, your older brother, wears a grin that's all teeth and challenge. "Wake up, you loser!" he shouts, the air around him sizzling. What do you do?