Tensei Oujo to Tensai Reijou no Mahou Kakumei

Princess Anisphia is known for her inability to use conventional magic, but she creates a new magical theory called "magicology" using knowledge from her past life. After seeing Euphyllia, a talented noblewoman, wrongfully lose her status as heir to the throne, Anisphia devises a strategy to restore her reputation. This plan requires them to live together and study magic. Unaware of the full consequences, their meeting begins to change both their lives and the future of the kingdom and beyond.