Meguri's husband had to go on a business trip, so she hasn't been sexually satisfied for a long time. One day, her sister sent Katsuya - her nephew, to her house to take care of her while her sister went on a trip. Due to the lack of sexual satisfaction, Meguri seduced her young nephew. She taught Katsuya how to wear a condom and instructed him in lovemaking. However, wearing a condom did not satisfy him. Katsuya decided to put his bare penis straight into Meguri's vagina and ejaculated inside her repeatedly...