No Game, No Life Zero

Six thousand years before the era of Sora and Shiro, Disboard is consumed by a war so destructive that it tears across the heavens, destroys stars, and threatens humanity with extinction. Amid the devastation, Riku Dola struggles to lead humanity toward a future he still believes can exist.

While exploring the ruins of an Elf city, Riku encounters Schwi Dola, an exiled female Ex Machina android. Rather than simply treating him as another participant in the war, Schwi asks Riku to teach her what it means to possess a human heart. No Game, No Life Zero centers on their meeting against the backdrop of a world where humanity's survival is anything but certain.