This basically what if Kanokari, Nagatoro and Shounen no Abyss had a wild hard drugs and hatesex session and a children born out of sheer hatred comes out of there.
MC has the lame personalities of both Kazuya and Paisen and their unkempt looks, while Hizumi looks a lot like Nagi, but has both N*gg*toro's sadistic nature, Chizuru's perfection and Yuuko's personality.
Ryou is gonna comment and recommend the vol. 2.