Marina who secretly spends her frustrating days without dealing with her pale husband while hoping for a child treasure. At that time, her brother-in-law, Takeyuki, suddenly returned home. Marina sees through her desires hidden in her fierce female play. Although she refuses once, her body, which has been developed with her relentless and polite caress that her husband does not have, and a violent piston that scrapes her vaginal wall, is washed away many times. And she was sick of her pleasures with her brother-in-law.