Keita Kawahira defeats evil monsters along with his Inukami, Yoko. One day, he receives a request from Spiritual Investigator Shiro Karina to defeat an evil spirit. The target, Osui Eisawa, had despised couples when he was alive. Therefore, he has become a demon lord with the ability to make people naked. In order to lure out Eisawa, Keita and Yoko act out a loving couple...