Her Royal Highness Seems to Be Angry

Synopsis

The Greatest Mage, Princess Leticiel, lost her life in a war and transmigrated a thousand years into the future. Angered by the regression of "Magecraft" in that world, Leticiel set out to develop it, much to the dismay of those around her. However, her actions would soon get her and the people she knew involved in a certain plot... (Source: Overlap, translated)