The schoolgirl "Miyu," who rides the train, is constantly bothered by unwanted advances. "This guy's hitting on me!" she thinks. If only she could shout it out loud. Timid by nature, she always endures the groping sensation of her buttocks being touched beneath her skirt, biting her lip and staring at the illuminated sign for her destination. However… that day, the advances were different, the touches were different. She unconsciously became aroused, feeling… "So good." She even began to anticipate more touches. "This is on the train, and there are many people around. I… was touched in the genitals by a strange older man… I orgasmed!"