As he enjoys the days of his normal youth Touji Kiyoteru starts living at the house of his late grandmother, who had mysterious powers. Then, among the mess inside, he finds a blood pact his grandmother used to summon a demon familiar! All of a sudden, a butt naked demon appears and says he's hungry. As he starts sucking mana out, Kiyoteru gets horny…?! Kiyoteru is a super sadist, while the demon is a super masochist… (Renta)