Maou no Mama ni NarundayoMaou no Mama ni Narundayo!; 魔王のママになるんだよ！; How to Train Your Devil.; Je vais être la mère du Roi Démon !; Теперь я мама повелителя тьмы!

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.