Takuya's mother, Hisayo, was beautiful and kind, and he was proud of her. Many of his friends came to play just to see Hisayo, and Ryo was one of them. One day, when Ryo was alone with Hisayo, he accidentally looked up her skirt and was captivated by the sexy underwear she was wearing. Hisayo lifted her skirt to show off to Ryo.