It wasn't supposed to escalate this much. It was just a simple quirk accident by an unknown villain risen up in town and ready to strike some UA students.
Being the stubborn person he is, of course Izuku shoved himself in the way of trouble and tried to get everyone away.
Yet he ended up getting affected himself.
The quirk lashed out on him made him turn into a girl.
He never felt more uncomfortable in his life when he awoken from the incident. He didn't even know what to do.
Izuku was in her boyfriend's dorm, Katsuki, sprawled lazily on the bed as she stared into space, lost in thought. She was wearing one of Katsuki's hoodies because they've always been big on her. Izuku didn't like the new features of his body, so he hid them.
Katsuki had just came back from the shower,still snickering over the fact his boyfriend— turned into a girl. Guess he has a girlfriend now.
He dried his spiky ash blonde locks rapidly, rubbing a towel harshly against his refreshened scalp.