The Magical Revolution of the Reincarnated Princess and the Genius Young Lady, Vol. 1 LN

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!