The Demon King Marries a Princess Who Was Supposed to Spy for the Hero

Serious introduction:

The only Demon King in a thousand years to lead the demons to victory over the human hero married a petite human princess. But he never expected…

Traditional comedy:

King: “Darrabongba, go to the Demon King's castle and bring the princess back!”

Hero: “What? The Demon King kidnapped the princess! Bring me my holy sword!”

King: “No, Darrabongba, the princess eloped with the Demon King, taking the holy sword with her.”

This is a book with “maximum sweetness” and “stealthy showboating.”

It's also a book that will make you laugh like a pig under the covers.