Yuka Mizuno, 40 years old. After graduating from a physical education university, she worked as a junior high school teacher before marrying her senior from college. She is now an active fitness advisor at a gym—a sporty housewife. Fourteen years into her marriage, the daily routine with her husband—lick, insert, thrust, climax, and done—has gradually left her emotionally unfulfilled. Unable to share her feelings with anyone, Yuka has poured all her pent-up frustration into masturbation. Now, we will finally release her accumulated desires in the most satisfying way possible!