Watashi no Hara no Naka no Bakemono

Chinatsu is a middle school student known for her academic excellence and good relationships with her peers. She lives a content life without apparent resentment toward others. However, during her menstrual cycle, she becomes aware of a deep-seated hatred for her homeroom teacher and irritation with those around her. These emotions, previously suppressed, lead to a shift in her behavior. As she acknowledges these feelings, a hidden aspect of her personality begins to surface, causing her to act out in ways that expose her darker side.