Ryo, a wife who was lonely at her husband who was not interested in herself. During the business trip, only the gentle words of his brother-in-law, Toru, who had to stay, were encouraging for Ryo. One day, Ryo learns about her husband's affair. And Toru, who saw Ryo's sadness, gently embraces Ryo. Ryo, who felt a deep affection and warmth, accepted it while thinking that it should not be done, and the two gradually drowned in a love-filled sexual intercourse while keeping their bodies in close contact so as to fill the gap in their hearts.