Chen had been her best friend for years,She had always loved that kid although she usually had to take care of that brat. He was the worst and best thing that ever happened to her, especially when he became a part of Exo. After becoming a trainee she wouldn't hear from him for days, and after their debut days turned into weeks, and weeks turned into months. 

What happens when Ara returns to Korean 4 years later and gets in touch with Chen again