One day, Ruri, who was tired of her boring days, encounters a molester on the train. Suddenly overcome with fear, she is unable to make a sound as her huge breasts are squeezed and she becomes obedient to the molester. Ruri runs home as if she is running away, but remembering the excitement she felt on the train, she indulges in masturbation. Awakened to a pleasure and excitement different from her everyday life, Ruri once again boards the train with the molester...