No Game, No Life Zero

Six thousand years before Sora and Shiro were even a blink in the history of Disboard, war consumed the land, threatening to wipe out the human race. Amid the chaos, a young man named Riku leads humanity toward the tomorrow his heart believed in. One day, he meets Shuvi, a female exiled "Ex-machina" android who asks him to teach her what it means to have a human heart.