Kamiya launched the light novel series in 2012 with his own art after illustrating another light novel series that spawned an anime, A Dark Rabbit Has Seven Lives (Itsuka Tenma no Kuro-Usagi).
The light novel series already inspired a television anime series that premiered in April 2014.
Yen Press is publishing the light novel series in North America, while Seven Seas Entertainment is publishing Mashiro Hiiragi’s manga adaptation.
Crunchyroll streamed the television anime as it aired, and Sentai Filmworks released it on home video in North America.