A mother's desperate struggle to save her son's future is gradually consumed by darkness. Facing her son who refuses to attend school and resorts to domestic violence, Reiko seeks help at a rehabilitation facility called "Kikuai Juku." However, she grows uneasy upon meeting the director and his aggressive methods. Another mother, Akari, who has also given up on her own son, becomes drawn into the facility's disturbing atmosphere. Reiko's suspicions prove correct—but by the time she realizes the true meaning behind the name "Kikuai Juku," it is already too late. What unfolds is a heartbreaking and disturbing scene where mothers confront the instructors, caught in a web of humiliation, incest, rape, milf, anal, and double penetration.