His biased parents forced him to give up his S-Class Job, not knowing he has infinite Evolution!

What the story is about

After transmigrating into Xiao Yu, a young man in a world where game classes and monsters have become real, he is forced to surrender his coveted S-rank class to his favored adopted brother. Left with an F-rank Beast Tamer class, Xiao Yu discovers divine talents that let him evolve his beasts without limit and survive through their contracts.