Becoming a Demon King in Another World

A quirky, beautiful young man from a family of intelligence brokers transmigrates to another world and begins life as the Demon King.

"Your Majesty, leave it to me! You'll smash right through the Demon Realm!" Lucifer is always stopping the Demon King from stretching his muscles.

Fine, if the Demon Realm isn't suitable, then His Majesty the Demon King can come up to the mortal realm and wander around.

A few things to keep in mind:

Although the Demon King is very beautiful, humans, remember: you may admire from afar, but do not touch! (Pay attention!)

Is the Demon King evil? No, no, no! The Demon King can be a savior, too!

To borrow the words of a certain bookworm, the title could also be: "Ophelia: I Have So Many Male and Female Rivals in Love!"