Sister Natsu (24) and younger brother Naoto (23). Natsu has a bold, tomboyish personality, and claims she doesn't see him as a man at all—just her cute little brother. Their relationship is strictly familial, nothing more, nothing less. Even though they've both graduated, when asked if they're still doing it, she answers without hesitation. Unexpectedly, the siblings grow sexually aroused by each other's bodies, leading to consecutive bareback creampie sex. An erotic love story between brother and sister unfolds in this intense amateur encounter.