When does Blue Exorcist return?

Blue Exorcist is a Japanese dark fantasy manga series written and illustrated by Kazue Kato. The story revolves around Rin Okumura, a teenager who discovers that he and his twin brother Yukio are the sons of Satan. When Satan kills their guardian, Rin enrolls at True Cross Academy to become an exorcist under Yukio's tutelage in order to defeat Satan. The manga has been serialized in Shueisha's sh?nen manga magazine Jump Square since April 2009, with individual chapters collected in 31 tank?bon volumes.