Kekkaishi no Fugue

, is a Japanese light novel series written by Hazuki Minase, with illustrations by Hirofumi Naruse. The series began publication on April 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
A strange job request letter has arrived to Ema Kanuki and his assistant Rintaro, who run a "escape shop" that is known in a different world. The sender is unknown. Immediately, I went to the place written in the letter, but it was a hidden village protected by a barrier, and a strange festival that lasted for 7 days was about to begin. Villagers who hide something from the votive tablets, and a captive girl who believes she is happy ... When the festival reaches its climax, the truth about the hidden village will be revealed!