A chaste married woman falls into the big dick temptation of a sportsman full of sexual desire. Even if she becomes sexless with her husband, Ibuki, a married woman who starts attending a personal swimming school to improve herself ... Ibuki, who couldn't get the big dick of the instructor Tanaka she met there out of her head, had a physical relationship with Tanaka and drowned in the affair sex of the muddy swamp with Tanaka that her husband could not taste. A married woman who can't be embraced by her husband knows the joy of a woman with the instructor's big ...