Man this manga really deserves the tragedy tag, really messed up ending i dont even know how the mc could even bear to talk with inugami, id really care about the teacher since he was pretty much mentally destroyed and manipulated but the way this ended.......this will be sealed on my memory with some other endings that i dont even remember but im sure are the worst of manga history and that means my brain is working correctly not remembering them, in 3 or 4 days i wont remember i read this manga and subconsiusly will avoid it.
For everyone else that stuck until the end good luck dealing with the feelings.