How to Build a Dungeon: Book of the Demon King Vol. 1

After dedicating his life to arcane research, Aur has finally unlocked the secrets to becoming a Demon King. Using his newfound power to summon the enchanting succubus, Lilu, Aur begins to build a dizzying array of maze-like halls that will become his fortress. Thus begins a dark fantasy adventure of a Demon King bent on conquering the human world that he never trusted!