A sunny and handsome new-generation singer-actor, who has never left the scandal story, but who knows that the one he loves is an ordinary childhood sweetheart. An ordinary girl always has gorgeous dreams, imagining that her prince will come to her on a white horse, but dreams are dreams, and she never believes in that nothingness. Although she has the enviable prince in front of her, she knows the gap between them, so she never dares to dream about it, but she doesn't know that the prince's heart has never left her. Love always makes people confused. Then I have to ask you, I am your childhood sweetheart, are you my best friend?