 The manga began serialization in Shueisha's "V Jump" magazine from December 2010 and is licensed in North America by Viz Media.The anime series was produced by Nihon Ad Systems and TV Tokyo, and its animation was done by Gallop.It aired on TV Tokyo from April 2011 to September 2012, with an English-language version airing in North America between October 2011 and August 2013.