An urban legend states that those exceptionally gifted at gaming will be sent a special game invitation, and the winners of the challenge will be whisked away to another world. When Sora and Shiro, two hikikomori NEETs who happen to be both siblings and notorious gamers, receive this invitation, they defeat it with ease. And like the legends tell, they're transported to another world where conflicts, peoples' lives and even country borders are decided by competitions and games. Always up for a challenge, the pair quickly take on the obstacles that come their way, whether it be restoring lowly humanity's good name compared with the other races or helping influence who will become the next king.