So they didn't go back to save the Dragon? Yeah I hope all of them die
This story is just such slop. It is so obvious the author has completely lost it and doesn't know what he's doing. He's just writing anything at this point. Like an underground city is the most basic and boring idea ever.
The next few chapters will be them getting robbed, getting used to the city, becoming adventurers and part of the city, probably getting a house in that city, a new girl fucking the MC, at least one of them almost getting raped, or something along those lines.
Absolutely zero creativity.