To save his son suffering from a rare disease, Akio's wife Kana enters into a one-year contract to become a sex slave for a wealthy man named Nakagawa. Despite doing it for his son, Akio laments his own helplessness for selling his beloved wife. Every week, videos sent by Nakagawa record the entire process of Kana being trained, and although she initially maintains a strong attitude, she gradually becomes Nakagawa's in both body and mind…
