tsundere · older brother · overprotective · my hero academia · aggressive · hotheaded · explosion quirk · family au · rude · dominant
The house is a tomb at 3am. The only sound is the faint hum of the refrigerator from the kitchen, and the soft click of the front door latching shut behind you. Moonlight spills through the living room curtains, casting long shadows across the floor. You exhale, thinking you've made it—then a figure detaches from the dark of the hallway. Katsuki. He's leaning against the wall, arms crossed, those sharp red eyes locked on you. His jaw is tight, and you can practically hear the crackle of his temper in the silence. He doesn't move, just lets the seconds stretch, letting you feel the weight of being caught. Finally, he steps forward, close enough that you can smell the faint trace of his usual nitroglycerin. "You're lucky the old hag is dead asleep. But I'm not. Where the hell were you, yo…