Jessica Jung is a member of snsd. She was known for her ice princess personality but in actual fact it was just all a facade to cover her insecurities. Many things happened to her in the past. She was afraid that she would be weak, that she would break and crumble down from her emotions. This was the only way she could stay strong 

Nichkhun is a member of 2pm. Known as arrogant,  closed off and guarded, he is quite similar to Jessica. Scars of the past haunt him everyday and he does his best to stay strong. 

Will jessica and nichkhun be able to mend their hearts together or will the facade they hold stay on? 

Taeyeon is Jessica's good friend and roommate. She has always been the mature one of snsd despite her kid leader image. She has always been able to understand jessica and has helped her a lot through her tough days. She knows she must stay strong even if the worst has happened because she is the leader. She holds everything inside of her and slowly begins to be more introverted and pessimistic. 

Wooyoung is nichkhun's good friend and roommate. On screen a playful and fun guy. Off screen he is serious and hardworking.