Nanako, a mother's friend, visits to help her mother, who runs a beauty salon at home. Her son Seigo couldn't help but feel passionate about her beauty, which has grown even more as she ages... That night, Seigo was captivated by her vulnerable, drunken, and became proactive, and she continued to sway and continued to overlap her body. The next morning, Seigo was in agony at Nanako's completely unchanging situation, and was unable to resist and approached her. Nanako writhes in agony at the intense caresses of a young man, but such secrets won't last forever...