I want to have the best experience with the best partner that will become a memory for a lifetime. Oda, who is still a virgin, dreams of his first experience. At one point, he goes to visit a friend at his friend's house and meets his friend's mother, Rio. She is the one! Oda is convinced at first sight and can't wait any longer, so he goes to peek at Rio taking a bath. There, he sees Rio masturbating in the bathroom. Having succeeded in taking a secret photo, Oda plans to blackmail Rio using the photo to have her take his virginity...