I just kinda skimmed because I'm expecting it to be some sort of law of the jungle type bull, everyone involved is going to grow so powerful from dungeon delving that the government has no means of appeasing them so they just let them have their ways, paper thin erotica hentai land logic which as a degenerate reading this solely for the Plot and not the plot, I'm okay with that too.
But I hope that the MC at least understands what kind of place he's in asap and starts steamrolling as the OP protagonist that he's already been hinted as being. He also definitely has to be living under a rock to not even have heard mutters of the reputation of the kind of place that he just entered.