Shinreki 71, 70% of all human beings have finally migrated to space due to the development of space cities. Between two organizations called the Dorushia Military Pact Federation and the Atlantic Ring United States (ARUS), there is a small neutral nation called Jiouru that has prospered economically. In the same year, Tokishima Haruto, a high school student living in Jiouru discovered a mysterious mecha called Valvrave during the Dorushia's attack in the nation.

Source: Wikipedia

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Sequel: Kakumeiki Valvrave (2013)