The first 2 episodes of season 2 received an early screening at a special event held at Kadokawa Cinema Shinjuku on January 13, 2012. The regular broadcast started on April 5, 2012.
Based on a light novel series written by Kimura Shin'ichi and illustrated by Kobuichi and Muririn.
After the conclusion of season 1, a drama CD was released which featured seven cast members reprising their roles.