Harlequin's memories have been forgotten after being knocked off of a cliff, everything about his life with the fairies, everything about Helbram and Elaine, and everything about the fairy he loved.

A time long ago, one before the Seven Deadly Sins, before the destruction of the Fairy King's forest, there lived a girl. Her name was Y/N, and she roamed around the forests of the fairy land. Though a mere legend, the tales of this girl float around as gossip and tales to children, but what happens when a certain young fairy happens to run into this "Ghost Girl"?