As a student at an all-girls Catholic high school, Souko Toujou is often absent from class as she focuses her efforts on securing the affections of any guy she can entice. Despite her reckless behavior, her homeroom teacher, Ueda-sensei, recognizes her potential and endeavors to steer her towards a better path. However, he certainly did not expect to fall prey to her seductive maneuvers.
Their initial attraction quickly deepens into a profound and passionate romance. Yet their relationship is filled with drama and emotional turmoil, as they struggle to reconcile their feelings with societal expectations and the reality of their age difference. It is worth noting that Ai Girl tackles mature themes and explicit content.