Sono Bouken-sha, Toriatsukai chuui. ~Shoutai wa Muteki no Geboku-tachi wo Suberu Isekai Saikyou no Madou-ou~

A rookie adventurer who understands the secrets of the world? The King of the Sky Castle finally descends! After being transported into a game world, an adventurer begins to change the fate of that world in this fantasy adventure.