Henry Lau is the rookie member of Super Junior M, he's a new comer in Korea and very busy training for Suju ever since he's arrive in Korea, but his mistake was not paying attention of his agency organizational structure which had him clueless of who is Sunny. Sunny is the only niece of Lee So Man, CEO of SM group, Henry's agency, a beautiful, rich yet free-spirited young girl who mistaken as a groupie by Henry.

What always comes out of U are jokes. I am so confused if they are real anymore. So how do U&I works?   "Don't look at him" You said. But why?

She is a princess who wants to try to live as a normal citizen. He is a weapons expert who lives freely in the dark world. They have a unique yet simple meeting but things get complicated after that.