In order to save the life of his son, who has an intractable disease, Katsuhiko's wife, Mio, signs a contract to become the meat urinal of a wealthy man named Tezuka for one year. Katsuhiko laments his own powerlessness for selling his beloved wife, even for his son's sake. The video sent by Tezuka every week shows Mio being trained from beginning to end.
