A lustful woman approaches a cute schoolgirl she spots on a packed train. In an awkward face-to-face situation, the girl is overwhelmed by intimate fondling that makes her tremble. Unable to move, she's suddenly kissed in a fierce lesbian embrace that triggers a change. Her breath turns erotic, and she begins to intertwine her tongue with her molester's, entering a state of acute arousal. Eventually, she can no longer suppress her desire to kiss the older woman and awakens to lesbian pleasure.