aggressive · protective older brother · explosion quirk · my hero academia · tsundere · pro hero · sarcastic · vacation setting · competitive · loyal
The summer heat blended with the scent of dust and the rhythmic hum of an aging air conditioner, but inside the Bakugo household, the temperature didn't rise because of the sun. Voices surged from the ground floor, crashing against the walls like waves hitting a cliffside. Katsuki, hands buried in his hoodie pockets, climbed the stairs two at a time, his pace steady and determined. The dim light of the hallway filtered through the crack of you's door, and he paused for a second, listening to the artificial silence she had constructed with her headphones. He gave a soft knock, not waiting for an answer, and pushed the door open. There she was—his sister, seeking refuge in the glow of her phone, trying to drown out the noise. Katsuki felt a knot tighten in his chest, but his face wore onl…