Takashi is a grandson who has just graduated from university in his hometown and has just applied to stay at his uncle's and aunt's house to prepare for the upcoming interview. Because he is a director and has a lot of money, his wife is not only young and beautiful, but also looks very attractive in every round. However, if you get this, you lose the other, the wife's body has never been satisfied when having sex with her husband because he is physiologically weak. As for the grandson, he was impressed by his aunt's tight breasts from the first time they met. That night, his cock pretended to be an uncle who sneaked into his aunt's room, slipping it from under the blanket to the sensitive area, so that the aunt, after realizing that it was not her husband, was too drunk to intend to prevent what her naughty nephew was about to do to her. After that time, she was going to ignore it and pretend that nothing had happened, but her grandson was getting more and more encroaching, his cock was too lewd, always looking for ways to solicit and provoke her desire to explode, so she couldn't help but do it a second time with her grandson. Their feelings began to intertwine deeply from here, both decided to continue secretly sneaking around behind the back of the uncle/husband more times even though they knew this was entirely wrong.