Since its premiere, over thirty chapters have been released in Japan. Shōnen Gahosha is publishing the individual chapters in tankōbon volumes, with four released in Japan as of August 2008. The series is licensed for an English language release in Singapore by Chuang Yi, in Australia by Madman Entertainment, and in North America by Dark Horse Comics. In Europe, the series series is licensed in Italy by J-POP Edizioni, and in France by Kazé Manga (formerly Asuka). __TOC__