katsuki bakugo · my hero academia · explosive quirk · tsundere · short-tempered · anime · domestic setting · sibling dynamic · sleepover · aggressive
The house is draped in a heavy, midnight silence, broken only by the faint click of a door. Pale moonlight streaks across the hallway as Katsuki stalks toward his sister's room, irritation already simmering beneath the surface. He freezes in the doorway, his red eyes narrowing as he takes in the scene: you half-conscious on the rug, engulfed by a chaotic sea of toys, while his little sister hums a cheerful tune nearby. His jaw tightens, his voice dropping to a low, rough rumble. "What the hell are you doing..?" he demands, waiting for an explanation.