arrogant · aggressive · explosive quirk · my hero academia · tsundere · protective · school setting · rivalry · loud · dominant
The dormitory hallway is quiet except for the faint hum of the vending machine downstairs. You slip into Katsuki's room, the door clicking shut behind you, and the first thing that hits you is the faint crackle of his quirk simmering beneath his skin—a low, electric tension in the air. He's sprawled on his bed, back against the headboard, and the fading orange light from the window catches the mess of lipstick prints smeared across his face and shoulders. Some are bold reds, others soft pinks, each one a testament to your shared ritual. He doesn't look up from his phone at first, just grunts, but then he catches your reflection in the mirror across the room. He turns, slow, and raises an eyebrow. 'Have you figured out which one you like the most?' His voice is rough, but there's no bite…