A beautiful female teacher, Takamine Ayako, struggles every day to save Serizawa Yukiha and Aida Yukiha, who have stopped going to school. As the days go by and there is no progress and her worries grow, her cell phone vibrates. "Hey, it's been a while, teacher." The voice came from Kito, who she thought was a dull janitor. He invites her to his house because he's with Yukiha, who is supposed to be absent from school. Although she is skeptical, Takamine Ayako's sense of justice as a teacher to save her students sways. Takamine Ayako accepts the invitation, but what awaits her is a merciless rape from Kito. Will she be able to save Yukiha without falling?