Watashi No Hara No Naka No Bakemono

***Awaken the "malice" that lies dormant within you.***

Chinatsu is a middle school student known for her exemplary grades and is highly regarded by her teacher. She enjoys a good relationship with her friends and leads a joyful life without any animosity towards others. However, during her menstrual cycle, Chinatsu comes to a realization. She discovers her deep-seated hatred for her homeroom advisor and feels intense irritation towards her environment. Having suppressed her feelings for so long and ignoring them, she finally confronts this truth, causing the "monster" within her to unleash chaos and expose her true self.