Mynoghra the Apocalypsis: World Conquest by Civilization of Ruin

Synopsis

I reincarnated as an evil god. Ira Takuto succumbed to illness at a young age and ended up reincarnating in a world that resembled the strategy simulation game, "Eternal Nations", of which he loved playing when alive. What appeared in front of him was Atou, a girl belonging to the evil civilization that he used to play as, "Mynoghra". The two of them decided to create a new country in this world once again. (Source: Comic Walker)