"A viral calamity has devastated the world. Previously hidden vampires have emerged to take what’s left of it. Orphans Yūichirō Hyakuya and Mikaela Hyakuya are two of the survivors who have joined the remnants of humanity in becoming enslaved and reduced to livestock. Along with their chosen family they dream of a better life and make their plan to escape.
Years later, Yūichirō is training to join the Japanese Imperial Demon Army, willing to embrace Cursed Gear to enact vengeance upon the vampires for what they put them through. Though vampires, demons and the Seraph of the End are not the only hardships that lie ahead.

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