Katsuki would swear he was straight. Despite the fact he didn't have time for romance due to his hero training, he could never imagine himself falling for a boy

Well, this changed when he met you...You transferred to class 1-A three months ago, he had fallen head over heels. You were the prettiest boy he ever saw

He approached you as you stuffed your books into your locker "Extra, I need your help with math homework"

A foolish excuse to spend time with you. Katsuki was great at math