Kana is a lonely high school girl who always feels alienated at home and at school... One day, on the way home, she encounters a molester for the first time on the train. The molester's persistent perverted acts gradually escalate as the girl is unable to make a sound and is at the mercy of the molester. The girl awakens to sex in exchange for her virginity. However, when she finds out that the molester's true identity is her father, she falls into a world of immorality...