I Became the Villain's Trainer - Chapter 64

This book is about baby-making.

A man with a lifelong martial arts background, raised in Asia due to his family's profession, moves to the US for education and work. He discovers Historical Medieval Battles through a colleague and becomes deeply passionate about it. He trains hard and becomes skilled enough to represent his country.During a competition, his armor fails, and he's struck in the head with a two-handed axe, seemingly dying. But is this truly the end?

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