Amnesia

     On the morning of August 1, the heroine wakes up and discovers she has absolutely no memories of the past. A boy appears before her, and introduces himself as a "spirit" named Orion. The heroine struggles to regain her memories under the guidance of Orion. She then gets a phone call, but she does not recognize the name on her mobile phone screen. She meets her apparent "boyfriend," despite not knowing his face.