Mai is determined to live a perfectly ordinary life after an incident when she was younger. One day her determination is ruined when she finds out that she had always been arranged to marry someone called Kazuya Shibuya. MaixNaru

A 23 year old Mai Taniyama develops amnesia as a result of a car accident and returns to her 17 year old self. In the process of recovery she discovers her past relationship with Naru that everyone is trying to keep from her. NaruxMai

Naru leaves Japan for England. 2 years later SPR is established again, but Mai is missing. Their first case is at a haunted Ryokan. Almost immediately Naru's path crosses with an amnesiac mother and her child. NaruxMai

AU. Naru ends up getting sent to a Japanese high school for an unknown reason and meets Mai who is beginning to develop her psychic abilities. Together they investigate the mysteries of the school together and end up getting closer in the process.