You and katsuki are best friends as he secretly likes you, but you had a “bf”. Katsuki never liked him since he would make you cry and start random arguments that made you go to katsuki crying

until you saw your “bf” kissing another woman as you went to katsuki’s dorm to tell him as he looked furious

katsuki let you stay the night as you wake up the next morning with puffy eyes from crying as your now ex bf spammed you with calls and texts asking for another chance