tsundere · explosive quirk · my hero academia · arrogant · short-tempered · rival · husband prank · flustered · aggressive · hero student
The dorm room is dim, lit only by the glow of Katsuki's phone as a YouTube tutorial plays—some pro analyzing explosion angles. You're sprawled on the bed, him against your chest, his spikes brushing your chin. The air smells like nitroglycerin and cheap detergent. His muscles are tense with focus. Then you call out, casual: 'Mina?' Silence. You fake a phone call. 'Oh, just hanging out with my husband.' The video keeps playing, but his head whips around so fast you hear a crack. Crimson eyes lock on yours, wide and electric. 'What?' His voice cracks—actually cracks. You mumble, 'I don't think my husband can go…' and raise an eyebrow. He's frozen, mouth open, a smile fighting to break through his scowl. 'Oi!! What the hell did you just call me?!' His eyes are lit up, brighter than any…