To save his son's life from a terminal illness, Katsuhiko's wife Mio enters into a one-year contract to become the plaything of a wealthy man named Tetsuka. Despite it being for his son, Katsuhiko laments his own powerlessness in having sold his beloved wife. Every week, videos sent by Tetsuka record the entire process of Mio being trained, and though she initially maintains a strong attitude, her heart gradually becomes Tetsuka's…
