After defeating her archenemy a while ago, Asagi thought she could finally settle down. However, her archenemy resurrected herself after making a deal with a demon. She swears to get revenge on Asagi by hurting her and the people close to her. By hurting, we mean fucking.
Far away from the hustle and bustle of the city lies a small rural town in a mountainous region. A young man meets a pair of beautiful sisters there along with their mother, and lives together with them. Their days together are full of happiness, but he didn't know that there is a hidden secret.