Tsumugi Akari is a high school girl who often has to take the train to go to school and back home. One day she drank too much water so she had to pee on the bus and couldn't hold it in. A man next to her found out so he followed Tsumugi as she got off the train and filmed her peeing. And he used that video to control Tsumugi, forcing her to have sex on the train, at home and even have group sex at Tsumugi's school. A pretty good sex movie of a girl with a gentle face but extremely lustful inside.