Maou no Musume wa Yasashi sugiru!!

From Yen Press: The fearsome Demon King, who seeks to conquer the entire world, has abruptly put a pause on his campaign. The reason: His daughter is so kind, he’s worried she’ll stray from the path of demons! Determined to turn her into a merciless and fearsome heir worthy of the throne, he enlists for the help of his trusted aid. World domination can wait, for a parent's duties come before a king's! And so begins a devilishly cute and heartwarming comedy.