The Weakest Job Monster Tamer Is The Strongest With Loot Boxes

Leo, a 16 year old boy finally got his Class from God with all of the other 16 year olds in his village. However, much to his dismay, he received the Monster Tamer Class.
This class had been viewed as the weakest throughout all of time and therefore cursed, but this will soon change.
Not because of a misconception, but because Leo awakened a 'Loot Box' System.