Ruriko's beauty and lustrous sex appeal made her son's friend, Kenji, crazy about it. Kenji is increasing the frequency of visiting her house to meet Ruriko, who secretly admires her. Furthermore, when he learned that his son was a single-mother family, he could not suppress his sexual urge toward Ruriko. And Kenji invades Ruriko's bedroom and searches for her underwear. Then, I found a vibe with evidence of use in the chest of drawers. "Aunt, are you using this ..." Kenji finally realizes that Ruriko is frustrated ...