Start as Inherited Baroness

(Western fantasy + farming + hegemony + low magic to high magic + plane war + no sending girl self-green + slow heat + non-mount and blade fan fiction + non-ascension cool story + flexible moral bottom line)
Traveling through a different world, accidentally inheriting the barony, the lord farming, family business, from low magic to high magic, from baron to emperor, and then starting the plane war, the conquest of all worlds.
In this world, fighting spirit and magic complement each other, humans, elves, dwarves, orcs... compete to bloom the light of civilization and compose a vast epic!