Hi I asked this before but

I'm looking a yaoi/shounen ai manga that about high school boys and they are in the same school there is also two or three more couples they know each other (??) and I don't look for the main couple I'm looking for other one it's about a boy that actually loves his senpai (I'm not sure if he was older than him they could have been at the same age) he wants to get closer with him but his senpai doesnt allow that because he's afraid to fall for him, he has such a past, there is rumors about him selling his body which is true (he has been since he was a child because money problems) and what I also remember is that he kept call himself dirty and one point he called his senpai dirty as well but didn't mean it such a way that's what I remember