Eight years after remarrying, Shuzo has been deeply immersed in binding and training his wife, Mayumi (Hana Kano), to match his obsessive sexual tastes. However, lately, he's grown bored with his fully submissive wife. One day, his son from his previous marriage, Shuichi, announces his wedding, forcing the family into a shared household. The new bride, Fuu (Hiiragi Rui), is innocent and pure-hearted. Drawn to her youthful body, Shuzo begins forging a forbidden relationship with his daughter-in-law.