Genius gamer siblings (plus being NEET & hikikomori) Sora and Shiro are known as the undefeatable “__” (blank). Their talents and skills are so good they are considered as urban legend. One day, a young boy named Teto appears before them, claiming to be the “God” of another dimension where Sora and Shiro are summoned to, in which no violence is allowed and everything is decided by a game. Of the 16 different races residing in this world, “Humanity” is the weakest. After having the vast majority of their lands captured by the other races and being driven to the brink of extinction, Sora and Shiro challenge these one-of-a-kind battles of the intellectual powers in order to save Humanity.
空與白既是尼特族又是家裡蹲，但是在網路上卻是被奉為都市傳說的天才遊戲玩家兄妹。 稱呼現實世界為「渣遊」的兩人，某一天被自稱是「神」的少年特圖召喚至異世界，那是個戰爭為神所禁止，「遊戲決定一切」的世界─沒錯，甚至連國界也一樣。 被其他種族逼至絕境，只剩下最後都市的「人類種」，空與白這兩個廢人兄妹能夠成為這異世界之中的「人類救世主」嗎？ 「來吧，遊戲開始了。」