Six months have passed since her mother-in-law passed away, and Rinko has gotten used to living with her husband. Then, one day, her brother-in-law, Bunta, suddenly returns home... Rinko is fed up with Bunta, a playboy who keeps inviting her out at every opportunity, but she is swept away by his persistent approach and they end up having a relationship. Unlike her selfish husband with his special fetish, Rinko climaxes repeatedly as Bunta's caresses stimulate her womanly spots. Rinko loses herself in this new pleasure, and continues to be persuaded by her brother-in-law's relentless advances...