No Game No Life: Dai-2 Shou - Toubu Rengou-hen

Summoned by a boy who calls himself God in a world where games decide everything, the prodigy gamer siblings Sora and Shiro quickly rise to the top of human society. Having secured a future for the nation of Elkia and humankind in this world, the siblings set their sights on a new prize—the Eastern Union. It's finally time to challenge the other races!
(Source: Yen Press)