Makai Youjo Ni Tensei Shita OjiSan Wa Heiwa No Tame Ni Maou Ni Naritai

An old man was laid off from his job at a black company While wallowing in the depths of his despair he encounters a mysterious stone that sends him to another world filled with magic and alchemy The man finds himself reincarnated as Hiyo the youngest daughter of the demon lordHiyo attempts to make a dazzling fresh start in life by utilizing both her newfound magical powers and prior tribulations as a salaryman however the demon world is in the midst of a battle for succession In order to change herself the exold man is determined to defy the demon lord and her siblings And after meeting Ernest a hero with his own circumstances they work together to take over the throne of the demon lord for both the sake of peace and to search for a place to belong The two of them defy destiny even if it means destroying the world to do so