As an examinee, I decided to spend my summer vacation at my uncle's house in the countryside in order to concentrate on my studies in a quiet environment. I heard that my uncle has a younger beautiful wife, but when I actually met her, Yuri's wife was a plump busty beauty with a sex appeal that was too stimulating for me as a virgin, and my crotch was It reacts unintentionally. And that night, when I woke up in the bathroom, I looked into Yuri's SEX, straddling my uncle and shaking my hips, but I met Yuri ...