Chikan densha: Momoe no oshiri (1983)

Momoe is a petite Asian girl with long black hair, and this scene puts her in a tight spot — literally. She’s on a crowded train when a guy starts groping her, and it escalates fast. The public setting makes it hot, especially when he pulls down her panties and starts fucking her right there. Her white lingerie gets plenty of screen time, and the angles are solid, giving you a clear view of the action. The whole thing feels spontaneous, like a real public molestation fantasy come to life. She moans softly, trying not to draw attention, which adds to the tension.