Challenge Round 3 with the big-breasted sister and her virgin brother! If they can practice sex up to the point of dry humping, they'll win 1 million yen! The brother's penis is about to explode at the sight of his sister's massive breasts, which he has never seen before! As their clitorises rub against each other during dry humping, even the sister's reason begins to crumble!? Her body reacts with a jerk as her brother's erect penis slips in! Six incestuous sister-brother pairs recorded!
