Jisaburou belongs to the IT club. One day, Sakurako, the boss of the club, calls up several club members, and they try black magic. While doing it, he makes a mistake, and a monster suddenly appears in front of them. According to the monster, he needs more power to return to his world. And to generate the power, Jisaburou and girls have to have sex.... (Source: Himeya Shop)