MTL - Dressed As a Grass - Chapter 82

A polite and lethargic boy was reincarnated in another world as a vampire bishoujo.

Once in time, she became a peasant girl in Yuehe Village who had just been divorced. Her parents disappeared, leaving her with a five-year-old child. Little Baozi brother, grandma doesn’t care, grandpa doesn’t care, uncles and aunts are top-notch, cousins ​​make fun of them.

It doesn’t matter, we have space and the world in our hands. Let’s see her make a fortune with her little bun.

- Description from novelbuddy

Akari Nakamura isn't what anyone expects from an S-Class mage.With her stylish fashion and an attitude bigger than her platform heels, she's used to being underestimated. It comes with the territory. But after scoring the highest marks ever recorded on the Arcane Assessment Test, even Crescent Moon University's stuffiest professors can't deny her raw power.Too bad they're going to try anyway.As Akari navigates a world of old money and older magic, she discovers that the university's prestigious facade hides an ugly truth: they're systematically undermining students who don't fit their “traditional” image of what a mage should be.To win here, she'll have to make some powerful enemies and prove herself every step of the way.Oh well. Just another day in the life of the S-Class Gyaru!---A light-hearted yuri/futanari GL novel!

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.