Thanks to the development of the Dyson Sphere, The majority of the human populace lives in space. The Dorssia Military Federation, and the Atlantic Rim United States exist as major Military countries, while JOIR is a neutral principality, the story follows Haruto Tokishima as a normal boy going thru high school in T.C (True Calendar) year 71. This all changes when Haruto meets the humanoid weapon Valvrave.