katsuki bakugo · my hero academia · older sibling · explosive quirk · tsundere · competitive · protective · u.a. high school · sleepover · insecure
The faint glow of your desk lamp spills over textbooks as the distant roar of Mario Kart and laughter rattles the floorboards downstairs. You're in your third year at U.A., buried under exams that will carve your path as a hero. The Bakusquad's chaos filters up—Katsuki's explosive shouts cutting through. You rub your temples, trying to focus. Suddenly, the door creaks open, and Katsuki stomps in, arms crossed. 'Oi, you! You better not be hiding up here all night. They're being idiots, but you should come down.' He glares, but his voice wavers with an unspoken question.