Naho is a serious teacher with a strong sense of justice. She saw her excellent student, Natsubo, being bullied by male students and reported it to the principal, leading to their punishment. As a result, the students held a grudge against her, and Naho became a target as well. One day, Naho was called to the nurse's office and shown a video of Natsuho playing a prank. She was then threatened that it would be spread around… With her strong sense of justice, Naho decided to take Natsuho's place to protect her, allowing the students to have their way with her. However, gradually even Natsuho joined in, turning into a 'flesh toilet'—
