Synopsis: Makai Youjo ni Tensei shita Oji-san wa Heiwa no Tame ni naritai

Uncle who got fired from a black company and can't get up. Deep in despair... However, thanks to the power of a mysterious stone, he was reincarnated in the body of Hiyo, the youngest daughter of the King of the Demon World, in a different world made up of alchemy and magic! Using Hiyo's absolute magical power "authority" and the bitter experience of working as a member of society accumulated in her previous life, she tries to restart her life in a glorious way, but the demon world is in the midst of a battle for succession to the throne among the princes. The former uncle decides to confront the demon king and his brothers. In order to change myself, a dropout. Together with the antihero Rene, whom she met there, he seeks peace in another world and a place where he belongs, aiming for the throne of the Demon King. Two people who fight against fate. Even if it means destroying the world