Serin's Things

I read this yaoi manga where the protagonist was a female who was in love with the uke who was the “prince” of the school and she ended up becoming friends (?) with the seme who she didn’t know was with the uke, and fell for him instead. At some point she walked in on them doing it in the closet (?). If you know the name please tell me !! I think it’s pretty short, but I couldn’t find it because I don’t remember the name or anything.