For the transportation of confidential documents for a long-term project, the beautiful office lady Mio ended up using an abandoned railway for a year. Every day, in the eerie atmosphere of the train, she encounters perverts while fulfilling her duties. Over time, through the skilled techniques of these perverts, Mio's body has been developed into a completely sensitive body that reaches orgasm and ejaculates just from having her large breasts kneaded and her nipples twisted. Despite her will to resist, surrounded by perverts, her body is constantly given intense orgasms.