Okumura Keiko (Hojo) is a female teacher who has been in the teaching profession for over 10 years and has been appointed as the head teacher of a grade level. One day, she sees a female student breaking down in tears on the street. When she calls out to her, she says that she was molested on the train. It seems that there have been other victims as well, and Keiko, who has a strong sense of justice, is outraged by the despicable molestation and begins working as a train guard. Keiko is keeping an eye on the students on the crowded train. However, before she knows it, a suspicious shadow has crept up behind Keiko and is reaching for her lower body...