Kaori was fed up with her husband's extremely small penis. Frustrated by her sexual frustration, she was constantly thinking about other men's crotches. One day, her eyes were glued to the crotch of her husband's stepchild, Yukihiro, which showed its overwhelming presence. It seemed that his penis was too big and it couldn't stay in place. It was moved from side to side again and again... Kaori, who loves big dicks, couldn't keep quiet at the sight and approached Yukihiro.