Well, I really didn't like this manga.
If you ask me why, I would say cause I finished reading and I felt something like disgusted and sad with the world. Well, maybe that's what the autor wanted.
Kyoya gives me the impression that he's not human. I don't like him.
But, just to say something different, the art is really good.

I prefer manga with good psicological stories and something that I can learn in the end (ok that's cliche but its my taste). So, if you're searching something twisted and creepy, take your time and read Jiraishin, you'll like it.