富士見書房
The manga, created by Kaishaku, was serialized in the Japanese magazine "Monthly Dragon Age" (published by Fujimi Shobo) from May 2006 to July 2007. Three "tankōbon" volumes were released in Japan, the last of which was published on August 9, 2007. A light novel, "Kyoshiro and the Eternal Sky -Prelude-", was released in Japan on February 20, 2007.