Hey everyone,

I used to read this manga but I can't remember the name of it, so maybe you can help me out. The details I recall is that the setup is guy has a girlfriend that he loves but he can't stop cheating on her........with her friend! And then the story goes of course she finds out and she goes through a couple of stages first depression and she tries to sell her body! Then straight up crazy when she contemplates killing her boyfriend and in between that...I can't remember the exact order of events but in between that of course he promises he won't do it again but the friend that he's cheating with won't let him go because she has always loved him. That's all I remember.Thanks.