MF文庫J
is a Japanese light novel series written by Shiki Mizuchi, illustrated by Kohada Shimesaba, and published by Media Factory under the MF Bunko J imprint. The first volume was released on June 25, 2010, with a total of 20 volumes available in Japan so far. A manga adaptation by the illustrator, Ran, began serialization in "Monthly Comic Alive" during its June 2011 issue. It was one of five MF Bunko J light novel anime adaptations announced at Media Factory's Summer School Festival event on July 28, 2013. It has been licensed for North America by Funimation.