Ruriko's beauty and luscious sex appeal made her son's friend Kenji crazy. He is a Kenji who visits Ruriko's house more often in order to meet Ruriko, who secretly admires her. Furthermore, when he learned that her son was a motherless family, he was more and more unable to suppress her sexual urge for her Ruriko. And Kenji breaks into Ruriko's bedroom and looks for her underwear. Then, a vibs toy with evidence of being used is found in the closet. "Auntie, is she using this..." Kenji finally realizes that Ruriko is her frustration...
