Maou no Mama ni NarundayoHow to Train Your Devil; I'm going to be the Devil's mama!; Je vais être la mère du Roi Démon !; Maou no Mama ni Narundayo!; Теперь я мама повелителя тьмы!; 魔王のママになるんだよ！

For a long time, humans were living in fear of the Demon Lord’s dreadful menace. However, at long last, a hero, who could successfully draw out the holy blade emerged and defeated the Demon Lord. Finally, the world will go back to its peaceful state once again… Or so everyone thought.