MC why don't you try growing up and stop thinking like superman who doesn't kill his enemies? That's the reason why superheroes have such an abundant supply of villains!
This idiot mc, exterminating a dragon with the bunch of adventurers who can't even scratch a high orc. And inviting a maid who isn't an adventurer with the skill serving the dragon until it dies? Lol. Such a waste, why don't you just kill them then?