Originally published in 2013 by the Kadokawa Corporation, Tokyo
After rising to rule the remaining humans in the world of Disboard, 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 Flügel: the flying city of Avant Heim. But the Flügel are a mad race of god killers. Will things really go as Sora and Shiro plan?
