 Eight "tankōbon" volumes were released in Japan by ASCII Media Works under their Dengeki Comics imprint between June 26, 2004 and January 26, 2008, though Shueisha republished the eight volumes under their Young Jump Comics imprint featuring new covers, new character descriptions and revised panels.Shueisha published the remaining 10 volumes through volume 18 between December 19, 2008 and September 19, 2013.Seven Seas Entertainment licensed the manga for release in English, and the first six volumes were released between November 2008 and April 2010.