Bad mangas

This has an unrealistic and sadistic plot. I find that people are attractive by the dark vibes of this manga, that's why is not viewed negatively. For me is a messed up story. There is killing involved, stalkering, incest (although they are not related by blood, one of them is adopted), rennegation from the adopted family and in the end madness. The relations and actions that are happening are not healthy for anyone. There is nothing to take example from. And the end is the worst.