I need to find this manga

Okay so I remember it was a yaoi. Potentially a one-shot set in highschool but there's this bully kind of popular guy sleeping with this nerdy kid. The nerdy kid had like a crush on him but started feeling used. He tells the bully guy that he's dating someone and the bully realizes he likes him and goes to the boyfriend to tell him to break up with the nerdy kid. The boyfriend says he was never saying the nerdy kid and the popular guy gets mad and goes to the nerdy guy and they have seggs and he basically tells him that he can't get rid of him that easily