In the year T.C. 71, a significant portion of humanity has settled in space within the prominent "Dyson Sphere" city. The world is controlled by two powerful entities: the Dorssia Military Pact Federation, a result of a military coalition, and the Atlantic Rim United States (ARUS), which gained power through trade expansions. Meanwhile, the minor nation of JIOR remains neutral and prioritizes economic growth for the sake of peace.
Haruto Tokishima, residing in JIOR's Sphere as a high school student in "Module 77," lived an ordinary life until the Dorssian military invades without warning. The introduction of the Valvrave, an unknown humanoid weapon, thrusts the entire world into turmoil. Haruto's fate intertwines with the weapon's as he tries to navigate the chaotic state of affairs.
