Newly appointed teacher Erika Kitagawa faces the severe bullying situation occurring within the school. While the male homeroom teacher adopts a passive stance, Erika takes active steps to resolve the issue. However, her actions provoke the homeroom teacher's anger. Under the pretext of resolving the bullying, she is forced into a threesome with both the bully and the victim. Gradually, Erika's body comes under complete control. Subjected to humiliating torment in front of students, her mind and body are progressively driven to the brink.