Looking for uke seducing a guy that walked on him giving BJ to someone else?

I'm looking for a manga I saw a few months ago about high schoolers (?). One of the guys hear noise coming from a storage/gym room and when he peaks in, he see the uke giving of a 'straight' jock a blowjob. The jock(?) runs out the room after getting caught and the uke gives his attention to the guy. He seduces him and they have missionary sex.