Yui, who took her husband to the hospital because he had caught a cold, boards a train only to have the misfortune of encountering a molester. Why is this happening to her? What did she do wrong? Trembling in fear, she remains paralyzed as her body is mercilessly violated and made to climax. The intense pleasure completely overwhelms Yui, pulling her into the molester's ecstasy. Craving even more stimulation, she finds herself boarding the train again...