Junior Sister, I'm Really Just a Teacher

"As long as I want to, there is no one in the world that I can't kill." Fan Wushe, the top killer of the generation, climbed to the top of Blue Star and looked down at the people in the world. No one in this world is worthy of his sword. But he still lost, lost to old age, lost to time. By chance, his soul traveled to a person with the same name. However, here there are immortals flying everywhere and monsters running everywhere, but he has become a useless person in the eyes of others who cannot cultivate, an ordinary person who teaches the history of immortal cultivators in the academy. Taking advantage of opportunity, disguising, conspiracy, plotting... Everything is just to survive.