Ever since her daughter Kyoko got married last year, Ryoko has had a lot of free time on her own. One day, Kyoko's husband, Kazuya, suddenly visits Ryoko's house. "Actually, Kyoko was cheating on me..." Ryoko is at a loss for words when Kazuya's sudden confession and the truth are confronted... However, her unfaithfulness committed by her own daughter cannot be easily erased, and from that day on, Kazuya's "revenge" begins. Kazuya's "revenge" is too stimulating for Ryoko's long frustrated body.
