IU, showed off Kim Kwang Seok's original song "With a heart only to forget" at the fan meeting . In the new album "Flower bookmark 2" Had plans to record and even make a MV for this song, but after Kim KwangSeok's suspicion of being murdered and the death of his daughter, who inherited the copyright, 10 yeard ago was found recently, the release of the album was postponed, and this phantom song deleted from her album.