That Time The Demon King Disciplined his Children

After conquering the whole world, the Demon King didn't destroy it, instead, he sired 50 children from women of different nations that surrendered to him. After 30 years. The bored Demon King decided to sleep because of how boring the world turned out to be. When he woke up 30 years later, he found out that his children and their mothers ended his rule but couldn't kill him. Along with a new wife in the form of a Goddess, they're off to discipline both children and their mothers. ---------- Not a serious novel. Well, just tried to write this with an absurd plot that can go anywhere. We'll see where it will lead.