Van Gogh Reborn! - Chapter 219:

A high school student that has lived as a mob-character ―― Mimori Touka

After time-traveling, Su Yunjin thought she had married a lame brutish fellow. As it turned out, not only could the hunter husband do business and hold office, but his leg wasn't lame either.“Wife, take a seat, I'll make the money.”“And what about me?” Su Yunjin raised an eyebrow.The man chuckled lowly and pulled out two cute little buns next to him. On each side, the adorable buns clung to Su Yunjin's thighs, “Mommy, we want a little sister!”

After looking at a handsome man’s picture, he has transmigrated into another world. Rong Yi looked up at the sky, speechless. How unlucky could he be to have transmigrated into a loser + sissy’s body…

What’s worse, the original master of this body has been married to a man! And the worst thing is…

Rong Yi takes a deep breath and lowers his head to look at his chest! Flat! Check! Then he pulls open his pants and luckily see his ‘brother’ is still there, feeling much relieved…

He said to the little cute kid, “What did you say? Say it again.”

…

- Description from Novelupdates

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