Koukaku no Regios

Set in a distant future where pollution-contaminated creatures have overrun the earth, humanity is forced to survive within isolated, roaming fortresses known as Regios. Zuellni is one such mobile city, operating entirely as an independent academic institution. It is here that freshman Layfon Alseif has recently enrolled. Despite his reservations, Layfon joins the 17th Martial Arts Studies Unit, commanded by third-year student Nina Antalk, and embarks on a series of adventures. Serving as an original side story, this narrative places a stronger emphasis on Nina's perspective.