Airi Nagisa, a girl with a strong sense of justice, witnesses her childhood friend being bullied by classmates. She intervenes and forces the bullies to stop, making them promise she will become the rugby team's manager as a condition. Believing she can do anything to protect her childhood friend, Airi soon realizes the rugby team members see her as nothing more than a sex slave and cumdump. Faced with this harsh reality, the story follows her struggle to reconcile her ideals of justice with her own emotions.