
The second season started airing on April 11th, 2011 and continued till June 28th, 2011, producing a total of 12 episodes similar to the first season. The first season of the anime aired in Japan between October 6th and December 22nd, 2010 on TV Tokyo with the English version following shortly on Crunchyroll in North America.

The first one was bundled with the 10th volume of the manga series and serves as a prologue to the entire story. A total 3 OVAs have also been produced for the anime with all the rights to them being held by Sentai Filmworks. With such notable names working on it, fans of the manga knew that they were in for a wild ride! While the animation and the dubbing were handled by Manglobe, Crunchyroll announced that they will be streaming the show online on their servers. The characters are designed by Watanabe Akio, who also goes by the name ‘Poyoyon Rock’, while the series is directed by Shigehito Takayanagi. The script of the anime is written by Hideyuki Kurata of ‘Read or Die’ and ‘Gun Sword’ fame. The adaptation generated a lot of hype since the manga was a hot topic back then and also due to a lot of notable names in the industry being part of the project. It was first announced by Shogakukan in their magazine ‘Weekly Shōnen Sunday’ in 2010 to massive appraisal from fans. It is presently licensed by Sentai Filmworks in North America, who also produced an English version of it.

The anime adaptation is carried out by Manglobe and it aired in Japan from 2010 to 2013.
