Yuko, a mother, is seen in her underwear by her son's friend Shinji, who is staying over at their house. However, she shows an interest in the innocent boy and teases him Kokoro. Then, as she touches his strong body, she becomes aroused and can't control herself... Shinji's youthful vigor knows no bounds as he casually gets into a physical relationship with Yuko, and he continues to attack the depths of her vagina again and again. And before she knows it, Yuko's body exceeds its limits as they continue to have sex, and she begins to scream...