It’s a classic setup: Van is banished because his family thinks "production magic" is worthless compared to battle magic. Watching him prove them wrong by building an invincible city is the core draw. Character Dynamics:

OP production magic in action before it even hits English scanlations.

If you are looking for the raw manga of " Okiraku Ryoushu no Tanoshii Ryouchi防衛

Unlike typical protagonists who aim to conquer dungeons, defeat demon lords, or revolutionize warfare, the hero of Okiraku Ryoushu wants one thing: to live an easy, leisurely life. He intends to manage his small, disregarded territory without stress, enjoy good food, and avoid conflict.