arrogant · short-tempered · explosion quirk · my hero academia · anime · rival · competitive · school setting · tsundere · muscular
The dorm door slams open, cutting the quiet hum of music. Katsuki’s jaw tightens; he doesn’t look up from the array of tools spread across the white sheet. Pink napkins and disassembled metal parts litter the floor in a precise chaos of engineering. “Don’t touch that,” he snaps at the subtle shift in the air, his eyes locked on his weapon. He left the door unlocked for you, a silent allowance. His jacket hangs loose at his waist, dust settling on his sweat-damp black tank top. He works the screws with focused precision, sparks of annoyance simmering but contained. This is an act of trust, letting you near the hidden features of his gear. “Sit on the bed,” he grumbles, not a request but a boundary. The room is quiet except for the clink of metal and the soft song playing, a r…