Wortenia Senki (WN) - Volume 6 Chapter 16

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

Surgeon Guan Ryo Is reborn in Naruto’s world! Enjoy his trip as he uses his knowledge of the story to find his path in this troubled world and eventually stand at the top of Konoha!

- Description from Novelupdates

When Jiang Ming woke up in a strange world, he learned he had obtained immortality. In the dangerous and ruthless world of cultivation, he was determined to carve his unique path. Taking advantage of his immortality, he vowed to learn forbidden skills that would normally eat away at the user’s life.

As he continued on his path, Jiang Ming realized that with his forbidden skills, he could become the strongest.

The only way to stop the earth’s doom.Is to seduce the girl who is the student council president.