Kyokutō kyūseishu densetsu shōnen, igyō no kitai de musō suru. (Associated Names)

When a boy takes control of an unusual machine, humanity’s battle to reclaim the world begins. At the end of World War II, a demonic summoning ritual drastically changed the course of the world. A hundred years later, demons have become the rulers of this altered world, and humanity fights back with their magical mechs.…