Gray's old training companion Reitei Lyon is trying to revive a calamity demon, but doing so will make their former master's sacrifice meaningless! What's the secret of Gray's past and why does he keep taking off his clothing? Gray is revealed (metaphorically speaking) in this pivotal volume!

First published in Japan in 2006 by Kodansha Ltd., Tokyo. In keeping with the original Japanese format, this book reads from back to front and from right to left.