Through her me2day, IU shared a photo of herself against a winged backdrop and asked fans to promise her that they'd give much love to her new follow-up track. On February 17th, the singer wrote, "'The Story Only I Didn't Know'!�This song is more precious to me than any song I've ever sang!�Please give it a lot of love ^^ Good night!" The mural IU is standing before is actually a drawing that appeared in KBS's "Dream High." Fans commented in reply, "I'll hope for your daebak once more," "A song that doesn't disappoint!," "I have it on repeat, it's so good," and "Fighting with your singing and acting!" Source: Newsen via Joins