Strike Witches: Memorial Episode Together (ストライクウィッチーズMemorial Episode いっしょだよ, Sutoraiku Witchīzu Memorial Episode isshodayo) is a light novel series written by Akira Saeki. The novel has been released in Kindle digital book as well.
To commemorate the 10th anniversary of Strike Witches TV airing, Akira Saeki, who worked on the storyboard of the anime, novelized the sixth episode "Isshodayo". This is an extended version of the episode with parts that the author was unable to fit into the anime.
Yoshika, Sanya, and Eila were appointed as a nighttime special team, and had to act together at the base! Sleeping in Sanya room, entering the sauna together... Eila jealousy for Yoshika was mixed... One night during a flight, what Sanya heard on the radio was a Neuroi song!? But with everyone, I'll never lose!