Stop Calling Me A Demon King is the story of a man who was forcefully abducted into another world against his will. It's a world of swords, magic, monsters, and mismatched technology and politics. And the main character is having none of it. He's just concentrating on making his way in the world, no matter who he has to destroy in the process.
Is there a need to play nice when you never wanted to be involved at all? What are the effects on a person when the most cold blooded actions are what are necessary? Our "hero" is going to find out, whether he wants to or not.