At the end of summer, a secluded mountain resort becomes the setting where a pure young girl is drawn into a secret game with an older man. The story follows Aoi, the innocent protagonist, who, despite her immature body, obediently responds to the man's demands, taking her first tentative steps into the adult world. Though still a child, she comes to understand the "adult game," surrendering her body to him. Blushing with both embarrassment and excitement, she exposes her smooth, hairless mound, reacting sensitively to the man's training. Her body writhes as she continuously experiences pleasure. This work portrays the bittersweet allure of a pure girl touching the adult world—a story made for adults. *No performers under the age of 18 appear in this work.