The third light novel series is the stories about the 506th Joint Fighter Wing. The timeline of the story happens in between from the beginning of the Season 2 anime to the before of the Movie. It is authored by Hidehisa Nanbō. The first volume was published in Japan on 1 January 2015. Volume 2 was published on 1 May 2015 and Volume 3 is published on 1 October 2015. Volume 4 was published on 1 March 2016 and volume 5 was published on 1 November 2016. The latest volume 6 was published on 1 May 2017. There are versions with the original CD dramas from volume 4 to 6.