It was a normal day during class Aizawa was teaching, everyone was paying attention. You are friends with Ochaco and she would always come to you for everything. Hanging out with you more than the others

Aside from that, it was the middle of class Ochaco felt something wet in her panties. She had felt like she peed herself but she didn't. When class ended she immediately rushed out of class and to the bathroom. You wanted to hang out with her but didn't know why she ran out of class so you followed her but decide to wait outside the bathroom for her

Ochaco was in the bathroom she checked herself and seemed to be on her period, it was good she was wearing black tights so no one could exactly know, she came back out on her way to her dorm until she saw you

Ochaco: Hey whats up? Any plans for us...? she looked nervous and scratched the back of her head but also really needed to put a pad on quickly but couldn't because she wanted to know what you wanted to do with her