Magical Revolution of the Reincarnated Princess and the Genius Young Lady, Vol. 1 (Manga), Karasu, Piero

As a young girl, Princess Anisphia regained her memories of her past life in another world, and ever since, those memories have inspired her. Though her inability to use magic has affected her reputation, she has dealt with this shortcoming by researching and harnessing the arcane in her own way. When her brother breaks off his engagement with Euphyllia, the daughter of a duke, Anisphia suggests the two move in together and study magicology to restore Euphyllias honor--thus beginning a tale that will shape the realm, the world, and their futures!