Yui lost her key and couldn't get into the house, so she waited for her boyfriend to come home at her uncle's house nearby. When she told her uncle that she hadn't had sex recently, he suspected frigidity and for some reason I decided to have him checked it out. Yui started with physical contact, and before she knew it, she was being fingered and licked on the cunt. Eventually, Yui is convinced by this erotic old man and finally allows him to cum inside her!