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 tha this 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...?! Wait... why am I getting turned on by this demon?! This demon's seducing me with his naked body, and I can't control myself! Why is it that whenever I see him, I want to tease him?! Grr.... I'm going to fill you up with my mana! Kiyoteru is a super sadist, while the demon is a super masochist... (Renta)