Dansho no Grimm XII Shiawase na Ouji (Part 1)

is the twelfth 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 May 2010.

Synopsis
A week after Aoi had a deep wound. Aoi and his friends visit Shuji Taki and Kanako's workshop to find the victims of  who have failed to dispose of them. However, Yukino cannot help feeling afraid of Kanako. Yukino can't hide his doubts about the concept of "reviving", and ──.

(source: Bookwalker JP - Translated)