Sungyeol and Myungsoo have been together since their senior year of high school. Having dated for 3 years, Sungyeol knows almost everything about Myungsoo and vice versa. Sungyeol knows it's been Myungsoo's dream to stand on stage, performing; whether it be singing, dancing or acting. Sungyeol knows that singing is Myungsoo's main dream--being an idol. So, when Myungsoo gets the oppurtunity of a lifetime to debut as a solo artist, Sungyeol does everything to get Myungsoo to agree to the contract. 

But maybe, that's just the first step towards disaster for the couple. 

Step two comes in the form of the beautiful, young actress/singer Sarah Park, part of the internationally known girl group, Grey. 

Is Myungsoo's shoot to stardom what ends up killing his and Sungyeol's relationship?