Even the Demon King Wants to Save the World?

In this era, there are dark gods who are about to wake up singing funeral songs called despair, there are reborn ancient dragons roaring under the doomsday, there are brave men who are fighting for blood and mocking themselves for their naivety in the face of death, and there are also my beloved girls who are about to cry in my arms. Joy and laughter, sadness and mourning, all shine brightly on the stage called the world. But I am the strongest demon king in the world, and I occasionally go out of my way to save the world! (Pure Western fantasy, no harem, no upgrades, no golden fingers, daily life, group portraits, great fighting!)