Set on Earth after the End. The remaining survives inside domed moblie cities called Regois and learned to use weapons called DITE and harnessing the power of Kei to defend themselves against mutated nano-machine beasts called Contaiminods. A secret project awaken to fight and protect humanity it is known as Codename:CASSHERN. During the time he becomes a new student has he attends the academic city of Zuellni, has become a new member of the 17th Plantoon.

OC/Casshern x Felli Loss

(Note:Casshern appearance will be the live action movie version.)