Lv2 kara Cheat datta Motoyuusha Kouho no Mattari Isekai Life

Banaza, a humble merchant, is summoned to another world as a hero candidate, in the hopes that he has what it takes to defeat the demon army. When his summoners discover that he possesses no special skills, Banaza is summarily dismissed...but something goes wrong, and he can't go back home. Now he must find a way to survive in this new kingdom. Luckily, Banaza might be more powerful than anyone–including Banaza himself–realized!

(Source: Seven Seas Entertainment)