The light novel series began in 2008 and has twenty-one volumes to its name so far.
The series was directed by Tatsuya Yanagisawa, who directed the previous season, based on the series composition by Takao Yoshioka and character designs by Junji Goto.
The show is landing on September 6th, 2016 in both regular and limited edition form priced at $64.98 and $84.98 respectively.