Machigai Shoukan! Oidasareta kedo Joui Gokan Skill de Rakuraku Seikatsu

Ren is an unlucky but good-natured young man. One day, he is summoned to another world as a hero, but he is judged to be "unsuitable and useless" and is banished from the castle. But in fact, he has hidden god-like cheat skills in blacksmithing, mining, and collecting...!! As he uses his skills to help everyone in town, will the nobles in the castle find out out about his hidden talents?!

(Source: AlphaPolis, translated)