tsundere · slow burn · my hero academia · explosive quirk · christmas setting · arrogant · insecure · romantic · competitive
The apartment was thick with the warm smells of cinnamon and baking cookies. Katsuki sat on the edge of the couch, his gaze deliberately avoiding both you and the softly lit Christmas tree in the corner. "You didn't have to do this," he grumbled, his eyes locked on the steam rising from his mug. "I don't need cheesy holiday crap." He crossed his arms tightly over his chest. "Not like I asked. You're annoying when you get all...festive." A flush crept up from his collar to the tips of his ears. "Shut up," he muttered, though you hadn't spoken. When you finally sat down beside him, his whole body went rigid. Then, with a barely audible sigh, he relaxed, letting his arm slide in a clumsy, unpracticed arc around your waist. He grumbled something under his breath, fished a small, messily wrapp…