Synopsis: From Leveling Up the Hero to Leveling Up a Nation

By the age of 27, my skills in [Training] had reached a level of mastery. I had played a pivotal role in strengthening the hero's party, and my services were no longer necessary. Despite having aided in the formation of the group, the hero decided to part ways with me. However, as a token of appreciation for my significant contributions, I was granted a modest estate. As I departed from my previous adventurous life and entered my new domain, my thoughts wandered to the seven villages and their 2500 inhabitants. I pondered whether I could use my training proficiency to secure my territory and, possibly, defeat the demon king.