Amnesia

She wakes on August 1st with no memory of anything before that date. A spirit boy named Orion appears and agrees to help her piece together who she is. Searching her own belongings for clues, she finds a message from someone whose name she does not recognize — who is apparently her boyfriend. She must meet him and maintain the relationship without revealing that she has no idea who he is. Each possible partner leads to a different story about how her memory, and her love, came to be erased.