Even Given the Worthless “Appraiser” Class, I’m Actually the Strongest

In this fantasy world, "jobs" are god-given from birth, and heroes are born, not made. Ein's job as "Appraiser" has put him about as far from the "hero" pedestal as possible. Used, abused, and eventually abandoned by his fellow adventurers, Ein decides it just isn't worth going on. Lucky for Ein, though, the end may be the beginning and a new lease on life. It turns out that his "worthless" job may just be the key to becoming a hero after all. <em class=de-emphasized>(from manga)</em>

Synopsis from Anime News Network