To save his son suffering from a rare disease, Kyōhei's wife, Karen, enters into a contract to become a rich man's sex toy for one year. Despite it being for his son, Kyōhei laments his own powerlessness in having sold his beloved wife. Every week, videos sent by Ryōmiya record the entire process of Karen being trained, and although she initially maintains a strong attitude, Karen gradually becomes Ryōmiya's both physically and mentally…
