• Book Name: Makai Youjo ni Tensei Shita Oji-san wa Heiwa no Tame ni Maou ni Naritai Manga
• Alternative(s): The Old Man That Was Reincarnated as a Young Girl in the Demon World Wants to Become the Demon Lord for the Sake of Peace
• Genre(s): Reincarnation Genderswap Action Demons Isekai Fantasy Vampires
• Author(s): Kaisei Kyou
• Year 2022
• Status: Completed Download Manga
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Summary: 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 lord. Hiyo 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 ex-old 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...