In a world where games decide everything--even national borders--a genius brother-sister duo aim to put their gamesmanship to the test...to save humanity!
In the world of Disboard, everything is decided by games. And after rising to rule as the king and queen of the remnants of Disboard's humans, gamer siblings Sora and Shiro bail out of an unwinnable romance game against the races of Dhampir and Siren. To uncover the true strategy to beat it, they head for the home of the angelic Flugel: the midair city of Avant Heim. But the Flugel are a hideously powerful race, created specifically to kill gods--will things really go as planned?