A young man has always had a thing for his grandmother and seen her as a woman he desires sexually. On a hot spring trip together, he can't help but fantasize about having sex with her. Despite their age difference, she remains youthful and vibrant. In the bathhouse, they share a private area where they get intimate while washing each other's bodies. As his hands explore her more sensitive areas, her voluptuous body responds passionately. When she falls asleep, he takes advantage by teasing her until their actions escalate into forbidden incestual sex. Note that recording contents may vary depending on the broadcast method used.