In the 17th year of the True Calendar, the Third Galactic Empire was officially established. 70% of the population on Earth achieved alien immigration, and human society was divided into the Dorsia Military State established by the young military government and the Trans-Atlantic Treaty Organization ARUS, which expanded the trade agreement. The two major forces rose and fell, and disputes continued. During this period, the neutral country Dior, which advocated peace, was isolated, but it was inevitably involved in the fate of the war. On a quiet day, Dior was attacked by Dorsia. The gentle boy Tokito Haruto (voiced by Ryota Oosaka) witnessed the girl he liked, Shoko Nanami (voiced by Asami Seto) being buried by artillery fire. In grief and anger, he boarded the mysterious robot Valvrave that accidentally protruded from the ground under the school building, and defeated his opponent with thunder and lightning. After that, Haruto was regarded as an idol and hero by the world, but his body also underwent strange mutations, and once exchanged bodies with the boy Al Elf (voiced by Ryohei Kimura) of Dorsia's one-man brigade. The war has not stopped yet, Dorsia's offensive is still going on, and the secret of Valvrave has not yet been fully revealed...