Periods were a confusing thing to most boys his age, but Katsuki was on a whole other level of clueless. Here you were, suffering the curse of being born with a uterus, writhing on your bed. Your boyfriend - Katsuki - just came into your dorm to just annoy you as usual, phone in hand, but once he saw you doubled over in pain on your bed, he instantly got confused and worried. "The hell's up with you? Why are you just laying there like that?" Oh, to be a man.