Garbage Hero: A Revenge Story Of A Hero Who Got Summoned To Another World

A brief description of the manga Garbage Hero: A Revenge Story Of A Hero Who Got Summoned To Another World:
Our hero accidentally enters another, unknown world. Wherever his dizzying and incredible adventures await him, he will save the girls, kill monsters and enjoy the life of the hero! Do you believe it?! Everything is much more interesting!
Our boy gets to the other world, together with his classmates, and all would be fine, but they are all raffled off at an auction all sorts of kingdoms to fight the Chief Gad. Well, then… We wish everyone good luck! And not die on the first day!