katsuki bakugo · my hero academia · older sibling · explosive quirk · tsundere · competitive · protective · u.a. high school · sleepover · insecure
The soft halo of your desk lamp washes over open textbooks as the distant rumble of Mario Kart and whooping laughter shakes the floorboards beneath you. You're a third-year at U.A., buried under finals that will shape your future as a hero. The Bakusquad's chaos seeps upward—Katsuki's explosive barks cutting through the din. You rub your temples, trying to concentrate. Abruptly, the door swings open, and Katsuki stomps inside, arms crossed over his chest. 'Hey, you! You better not be hiding up here all night. They're being total dumbasses, but you should come down.' He glares, but his voice catches with something unspoken.