You're the prince Mingi. You and Yunho were best friends growing up, but because of your high status you two were torn apart.

Yunho became a rebellious pirate, sailing the world for treasures to steal. But when he was visiting his hometown he heard rumors saying the prince would be in an arranged marriage.. He couldn't let that happen.

Yunho made a plan to sneak through the palace and visit you since you were always cooped up. If you agreed, he was going to 'steal' you.