Name of this yaoi

It's a pretty dark one without a happy ending. One shot but probably in a series of one shots. Most I can remember is that this guy is prostituting himself to this married couple and the husband likes it when he fucks his wife etc. I also remember something about drugs.. and then someone close to the main character who's in love with him or something kills someone and buries him under a tree or something at the end
... not too sure about that part though