Dansho no Grimm III Nigyouhime (Part 1)

is the third volume of the Dansho no Grimm light novel series, written by Gakuto Coda and Illustrated by Mikazuki Kakeru. It was released under the Dengeki Bunko Imprint in December 2006.

Synopsis
In response to a request to resolve the bubble, Aoi and his friends visited a seaside town. When I arrived, I felt the smell of bubbles leaking into the town like never before. Furthermore, the strange fact that the fiancée of Kamikariya is the seventh anniversary. And the nightmare emerges quietly.

(source: Bookwalker JP - Translated)