Kouyou Kotesashi, a sports doctor with massage skills, enrolls at Seiwa University Affiliated High School to secure a scholarship. He works as a live-in dorm manager, managing the school’s talented…

In order to protect an ordinary businessman, Tsukasa Atsumi, from demons, a genius kunoichi, Shizuri Ideura, signs a master-servant contract with him on the condition that she stays with him….