Park Seo Joon a very wealthy man who takes his job seriously well do anything to get it done, he can be a very rude jerk if he's not comfortable or if he dosent know you, but he has his charms and can also be a sweetheart when he wants to be. Even though he has a girlfriend he still agreed on being engage because its his parents choice. 

Lynn yang a fashionista girl who gets what ever she wants. She's stubborn but with a good personality. Works for a fashion editorial as a stylist and designer. Has been put into an arranged marriage with Seojoon, not knowing he had a girlfriend.  

What happens when these two are entangle with one another when their parents had arrange them to become a couple.

What happens when your engage with your friends boyfriend. 

What should you do if you actually  fall in love with your girlfriend friend.