I'm a high school student so I decided to spend my summer vacation at my uncle's house in the countryside so I could concentrate on my studies in a quiet environment. I had heard that my uncle had a beautiful wife who was younger than me, but when I actually met his wife, Yuri, I found her to be a busty beauty with a voluptuous body and a sexiness that was too much for a virgin like me to handle, and my crotch reacted involuntarily. That night, I woke up to go to the bathroom and peeked at Yuri having sex as she straddled my uncle and shook her hips wildly, but our eyes met...