An original video animation directed by Kunihisa Sugishima and produced by Gonzo was released on January 1, 2007. The first anime season was produced by Gonzo and broadcast in Japan from July 3 to September 18, 2008. Aside from the traditional televised broadcast, the series was also made available with English subtitles and an English dub through YouTube, BOST TV and Crunchyroll, using a simultaneous release schedule similar to that of "The Tower of Druaga: the Aegis of Uruk", also produced by Gonzo. The YouTube and Crunchyroll broadcasts operate under a streaming window, allowing users to freely watch each new episode of the series on the day of their release for a set amount of time. Crunchyroll also offers individual episodes to be purchased and downloaded during and after this streaming window has ended. An uncensored version of the series was later released on Region 2 DVD, containing nudity that was obscured for the TV broadcast. The first volume was made available on September 26, 2008, the second on October 24, the third volume on November 28, the fourth volume on December 26, and the fifth volume on January 30, 2009. The anime has been licensed by Funimation and was released on March 30, 2010.