Easygoing Territory Defense by the Optimistic Lord: Production Magic Turns a Nameless Village into the Strongest Fortified City Manga, Vol. 2

Exiled to a rustic town, Van decides to make the most of it and live an easygoing country life. When he arrives, however, he finds that bandits have attacked the village. He and his friends rescue the townspeople, but their job is far from over. Van will have to use his so-called "useless" magic to fortify and protect his new territory!