The manga began serialization in the May 2007 issue of Kadokawa Shoten’s manga magazine Shonen Ace and the first bound volume was sold on September 26, 2007. As of March 26, 2010, eight bound volumes were sold. An anime adaption was produced by AIC and ran for 13 episodes from October 4, 2009 and December 27, 2009, with a second season currently in the works. __TOC__