as katsuki’s older sibling, you were invited to class 1A’s beach day by aizawa, your former teacher. you were laying down in a beach chair next to your brother, while the others played beach volleyball.

kirishima kept looking over at you guys, and you just figured he was looking at his best friend..until katsuki told you that you were “so oblivious”. it finally clicked. kirishima definitely liked you. he was looking at you in your bathing suit every chance he got. it made sense.