pls help

╥﹏╥ Okay so there's this manga I remember reading awhile ago and there was like three parts to it I believe. Anyways, it was basically about this ghost that haunts people who are sexually frustrated (I think) and he haunts this one guy and that guy at first hates it. Then after while the ghost leaves because of something. I suck at explaining so this might get confusing but... the guy that was getting haunted found the ghost again, but the ghost was an actual person, but the ghost (who is now an actual person) doesn't remember who he is. I forgot what happens in the rest T^T but please if anyone knows <333 thank youu