Yuka Mizuno, 40 years old. After graduating from a sports university, she worked as a middle school teacher, then married her husband, who was her senior at university, and is now a sports wife who has been married for 14 years and works as an advisor at a fitness club. Since getting married, Yuka has grown tired of the bland sex with her husband, which has always been the same: "I lick him, put it in, shake my hips, cum, and that's it." "I can't say it because I don't want to be thought of as a slutty woman (wry smile)." The only way to vent her frustration, which she can't tell anyone, is through masturbation, and we'll be releasing all of her pent-up desires with all our might!