Rushed to take up her new teaching position at Seiran Academy, newly appointed teacher Ayumi was called in as a replacement after the previous instructor resigned due to severe bullying-induced neurosis. However, she quickly finds herself entangled in trouble and becomes targeted by Sakurai Makoto, the leader of a delinquent gang. Using the excuse of needing after-school tutoring, he lures Ayumi out, overpowers her by force, and rapes her. Shattered both mentally and physically, Ayumi begins losing her dreams and hopes as an educator. When she confides in the school principal about the incident, she finds herself trapped in a hopeless situation with no way out.