A normal high school girl, Kawai Arisa, is often bullied due to her family's need to relocate frequently for her parents' work. However, she finds solace in the kindness of her classmate, Inogami Yuuki, who is the only person to treat her well. Despite this, her life takes a turn when a new transfer student, Yashiro Akira, accuses her of bullying him in her previous hometown. The truth is, Arisa has no memory of her life before a fall down the stairs five years ago. Could there be another side to Arisa's personality, one of a tyrant? Is she suffering from a split personality disorder? What other memories will surface to complicate her life?
