Many people comes in your life but doesn't stay forever. Even if they're your friends. Eunji and Luhan met through their mutual friend, Lay. Eunji was a motherly figure to Luhan. She promised him that she will always take care of him and never leave him in pain. But she broke the promise. She left him on that day. The day when Luhan finally decided to tell her the truth that kept burdening him for years.