Set in the distant future, this school fantasy story depicts a world where pollution-contaminated creatures have overtaken the land, forcing humanity to reside in isolated mobile cities known as Regios. Zuellni is one such city, functioning as a self-contained school where freshman Layfon Alseif has just enrolled. Reluctantly, Layfon joins the 17th Martial Arts Studies Unit, which is led by third-year student Nina Antalk, and embarks on a series of adventures. This version presents a slightly different account of Layfon's story. In this iteration, Felli serves as the main character, while the world settings remain the same as in the original novel.