The episodes of the Chrome Shelled Regios anime are based on the light novel series of the same name written by Shūsuke Amagi and illustrated by Miyū. They are directed by Itsuro Kawasaki and produced by the animation studio Zexcs. Set in a polluted world where humanity is forced to live inside isolated mobile cities called Regios due to the prevalence of mutated creates known as Limbeekoon and with Military Artists who wield kei energies to fight them, the anime plot follows Layfon Alseif, a new student in the academy city of Zuellni, as he reluctantly joins the 17th military arts platoon led by Nina Antalk and his uncertain future in the city.