The Heroine wakes up on august 1st, with no memories of who she is or where she's been. A mysterious boy named "Orion" appears before her, calling himself a "Spirit." With his help, she starts to put back together the pieces of her life and keeps the people around her from finding out that she's lost her memories.

Orion tells Heroine to keep her memory loss a secret as she doesn't know who to trust. At the restaurant a firework, sparks part of her memory with some disturbing news.