Shiina Miuchi-chan, a complete virgin who has never been inserted into either a man or a woman, experiences her first reverse anal experience with a penis that is erect and pointing diagonally upwards! Just a little touch and her penis, more willful than a male actor's, becomes erect and inserts into the anus. With each thrust of her hips, she becomes a captive of a pleasure unlike any she has ever felt before, continuing to insert deeply into her asshole many times! Suddenly, when a man's penis is inserted into her own asshole, she sticks out her tongue and becomes intoxicated with pleasure, experiencing the lost virgin sex of a shy, insatiable new half!