Manga How to Build a Dungeon: Book of the Demon King

"I don’t trust people. And they will betray you." Aur, a person who has acquired the ability and the right to become a maou at the very end of his own life as a means of research. Having summoned the Lyra succubus, he departs with the purpose of creating his own domain, a huge labyrinth dungeon... Misanthropic Maou takes the world, the curtain rises on a black garment of fantasy!