Kawasaki, who was visiting his friend Atsushi's house, happened to see Atsushi's mother, Miyu, changing her clothes. (She's such a beauty, yet she wears such big panties...) Seeing an adult woman's underwear for the first time since his mother, Kawasaki felt excited. From then on, he started stealing underwear and taking it home, but later Miyu found out about it. So, Kawasaki confessed that he was still a virgin and begged Miyu to deflower him.
