The strongest wizard Alfred, in a hero’s party, subdued the Maou and in the process took a cursed arrow to the knee. Even with the hurt knee, Alfred’s still the strongest wizard ever.

"We need a chief for our newly created knight squad!"
"Could you help us as our guild manager?"
"We need someone to rid us of the dragon that resides in the North Mountain."

Alfred just wanted some time to rest and recover, but no one would LEAVE HIM ALONE. Because of that, Alfred wished to spend time recovering in a small country village that no one knew about.

"Need a guard in Mulg Village. Wolves and boars attacking the village. Payment is food and board. *Village has a hot spring."
So, the strongest wizard in the kingdom decided on living the slow life in the country