After enduring horrific harassment from her classmates, Ayana Fujisawa has learned to simply stay quiet and wait for it to end. However, when the bullying escalates and she is deliberately pushed into traffic, Ayana is admitted to the hospital. She realizes that if she does not fight back, things will only worsen—and eventually, she might even be killed. In Ayana's mind, there is only one option: brutal revenge against those who have ruthlessly bullied her, those who have stood by and laughed, and those who have done nothing to help her during her torment.