Being friends even before either of you could walk makes things even harder to realize when you're drifting apart because of work. Eunsoo get's depressed when her childhood friend Hoya ignores her because of work and never have time to see her. He only texts her with empty promises about "let's meet another time" "next time" "another time, okay?". When Eunsoo is climbing up the mountain of popularity the fatigue is going after her. When she eventually faints on a recording for Strong Heart and get's rushed to the hospital, will Hoya ignore her because of work or will he ignore his schedule for his childhood friend? And if he do ignore his schedule for Eunsoo, what will the media say when they don't even know the relationship between the two of them?