Aya Asagiri has nowhere to call her own. Bullied at school and abused by her brother at home, she spends every day wishing for death. One day, Aya happens upon a mysterious website called the Magical Girl Site.

It seems the administrator's identity is a human girl. Tsuyuno dies protecting Aya and her friends, but she is brought back to life as a new administrator candidate. Tsuyuno is ordered to kill Aya so she can become an official administrator. Having lost her old memories, Tsuyuno attacks Aya with supernatural strength.