It was a pretty good story but left parts unexplained never really explained completely the supernatural stuff like does the super human of everyone that is evil really come from devils who was the gramps of the mc , where is his dad and mom at least in other mangas they say they are in a business trip or dead but this time nothing, it doesnt explain in any way the whole omnyojutsu the mc never speaks with that old man about his power for no reason, well thats about the stuff i remenber of the top of my head and too the whole ending being open in the sense that the mc didnt purify completely ranna and the girl that was released in jail it seems the author wants to have a window for a continuation just in case and with the anime coming out, you never know.