The Reformation of the World as Overseen by a Realist Demon King, Vol. 7 (manga‪)‬

With Eve, Toshizou, and Jeanne by his side, brand-new Demon King Astaroth has already bested three other demon kings on his way to mastering and reforming the world. His next target is Zagan, a monstrous demon king with a powerful hero on his side—the son of Genghis Khan!