Hayama, the sultry OL, is the unwitting prey in this daily game of cat and mouse. The pervy salaryman, hidden in the throng, watches her, his cock hard in his pants. As the train lurches, he seizes his chance, his fingers exploring her panties, finding her wet and wanting. Hitomi gasps, her eyes meeting his in the reflection of the window. She should stop him, but the forbidden thrill of public debauchery keeps her silent. The train reaches her stop, and she exits, his fingers still inside her, leaving her a mess of desire and unfulfilled lust.