Constellation Door - Chapter 59

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

What happens when a man gets transported into a foreign world filled with magic?

The world had started doomsday, and I struggled for a year, before I died under an enchanted beast’s claw. Heaven has given me another chance, back a day before the end happen. Will I be able to change my fate, and that of my loved ones? Now, I will start my journey on becoming the strongest on the planet that the Gods have changed into a game world.

- Description from Novelupdates

Mason was a mercenary, until the day he died on a mission after being betrayed by his unit.