Alternative:
Mahou Kakumei; 転生王女と天才令嬢の魔法革命; Tensei Oujo to Tensai Reijou no Mahou Kakumei; 轉生王女與天才千金的魔法革命; 转生王女与天才千金的魔法革命; Zhuǎnshēng wángnǚ yǔ tiāncái qiānjīn de mófǎ gémìng; MagiRevo
56,671
Despite her supposed ineptitude with regular magic, Princess Anisphia defies the aristocracy's expectations by developing "magicology," a unique magical theory based on memories from her past life. One day, she witnesses the brilliant noblewoman Euphyllia unjustly stripped of her title as the kingdom's next monarch. That's when Anisphia concocts a plan to help Euphyllia regain her good name-which somehow involves them living together and researching magic! Little do these two ladies know, however, that their chance encounter will alter not only their own futures, but those of the kingdom...and the entire world! --- - Official Web Novel