A petite 20-year-old girl, standing at 150cm tall with no romantic experience, decides to make her AV debut in order to change herself. Undressing in front of a man, kissing, touching a man—everything is a first-time experience. Unable to hide her nervousness and embarrassment, she nevertheless takes one step at a time towards adulthood. Her innocent expression gradually gives way to genuine emotions, and her small body hides a great resolve. Her "firsts" are captured in this film...