MTL - Concubine’s Stunning Daughter : Ghost Emperor Please Be Lenient! - Chapter 1175 Poor Qi, Imperial Forbidden Land

Luke a 13-year-old boy lover of all kinds of novels, series, and manga, dies and is reincarnated in Wednesday's world with above-average psychic powers.As he immerses himself in the world of outcasts and monsters, he will discover that it is not as simple as it seems. Luke in his new life is a descendant of the famous writer Edgar Allan Poe and must deal with an old family grudge.

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

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