Ryoko, a wife who has been married to her gentle and serious husband for 15 years and has a mediocre but happy marriage. - The Sasakawa couple, who are not blessed with child treasures, loved Yuta, the son of a single-mother family living next door, like a child. - One day, Ryoko drank raw spit at the conversation heard from the bathroom where her husband and Yuta got along like parents and children. - "Yuta's dick has become great !! Isn't it 17 centimeters !?" Sexless Ryoko couldn't overlook this conversation for three years.