I don't really know what to think about this manga. In a way it's interesting the way is narrated. Main character just comes out as really nacissistic. He just took everything from his "friend" and then has the nerve to feel "sorry" for himself? Get a grip, dude... but since the story starts kind of wanting you to simpatice with him... I can't be sure if the author was concious of how of an evil person his protagonist is. I want to think it was done on prupose.
Mizu no Ue no Tsuki