A high school student encounters a ghostly schoolmate wandering the campus. When her mysterious friend disappears one day, leaving unanswered questions, she follows his instructions and wishes on the moon. She subsequently finds herself trapped in the past on the day he died, unable to escape…

High-school student Pai Yu-Jan is secretly seeing a boy at her school who has a girlfriend. During one of their frequent trysts in the school’s rooftop garden, she bumps into a handsome older schoolmate, Yeh Chen. Just when she’s certain her secret is about to be exposed, Yu-Jan realizes Chen is a ghost only she can see.

The mysterious Chen tells her that he jumped to his death twenty years ago. Since then he has wandered the school as a ghost, meeting many students with regrets who wished to change the past. His instructions to make a wish on the moon gave them the chance to travel back in time and reverse events. He has remained here all this time waiting for Lien Yu-Chin, a girl whose love for him drove her to kill herself shortly after his death.

Yu-Jan only half believes what Chen has told her, but then he suddenly disappears one day. Because she misses spending time with her ghost friend, she too makes a wish on the moon in order to see him again. When she wakes up the next day, she finds that she has in fact traveled back in time to the day Chen killed himself, and that she is now Lien Yu-Chin. Even more strange is that Chen and Yu-Chin are not a couple! She is now trapped in the past, repeating the events of that fateful day. How many secrets are there for her to uncover? How will she break the loop and return to her own time?

Bestselling author Misa has created a high school love story combining fantasy, time travel, and suspense to depict the disorientation of youth, love in all its bittersweet aspects, and friendship put to the test. As readers unravel the mystery alongside the main character, they will follow a path of self-exploration and experience the growth that comes with interpersonal relationships.