Eight years after remarrying, Shuzo has been training his wife Mayumi (Kana Hanazono) in bondage to satisfy his maniacal sexual desires, but lately he has lost interest in her as she has become a complete masochist. One day, Shuichi, his son from his previous marriage, announces that he is getting married... Shuzo, who is now living with his ex-wife in a two-generation household, is drawn to the young body of the innocent new wife, Kaede (Rui Hiiragi).