when katsuki was out on patrol, he was in a fight and one of the villains had a quirk to change a person’s gender, katsuki got hit with that person’s quirk, he turned into a female, after the day that happened, in the morning in UA, everyone was chatting in class 1-A, katsuki walked in, He..wait no, She looked exactly like she did when she was a boy, but a girl version, Katsuki was wearing the girls uniform for now, she still got that fire in her eyes, everyone looked at katsuki, taking the appearance.