Alt. Title: ひみつの悪魔ちゃん / himitsu no akuma chan
Sou still finds himself under the contract to lose his virginity to the devil, Kogure. Desperate, Sou enlists the help of a sorceress named Aoi in order to sever the contract.
Aoi decides to send Sou off on a date with Kogure to a lovers amusement park. There, he discovers that there is more to the amusement park and to Aoi, when he finds himself trapped in a room with Kogure. Unfortunately for him, the only means of escape is to consummate their relationship.