Reiko, who works at a general trading company, is still single. Her ex-boyfriend is her boss and is married. After being molested by her ex-boyfriend's boss in an empty carriage on the way home from a drinking party, she awakens to the thrill of sex, and together with her ex-boyfriend's boss, she starts posting invitations to men on social media. Awakened to a new pleasure, Reiko becomes addicted to sex on the train. She goes wild, her beautiful pantyhose-clad ass shaking! The men swarm around her sweaty pantyhose like hyenas, licking and savoring the smooth nylon feel of her ass, thighs, and crotch. "I want you to make a bigger mess of me..."