After releasing the single and teaser, a short music video has now been released for the second We Fell in Love track titled Nagging performed by 2AM's Seulong and IU. The short music video is basically an extension of the teaser, showing them recording the song whilst fooling around behind the scenes. Although kind of random, they look pretty compatible as a couple. http://www.youtube.com/watch?v=1Ufz08dJkms Many thanks to V-Oh for the tip.