Searching for yaoi college couple

Hi I'm trying to look for a certain yaoi manga about this couple that are doing a project with other people and the ukes project partner likes the seme thinking that was his first crush but it isn't and that it's actually the seme's cousin ( I think) that's a girl and the seme's project partner tricks him into using a key for a club room so him and the uke can f*ck and the seme's project partner and the ukes project partner end up doing it in the same room as the same and uke

I know it's long but I just don't remember the name