The music video for the lead track, "Only I Didn't Know" (Korean: 나만 몰랐던 이야기; RR: Naman Mollatdeon Iyagi), features actress Park Bo-young as she is caught in a dramatic break-up story. Her ex-lover is played by singer-songwriter Yoon Sang, who also composed this piece as a gift for IU.[2][3] The music video was released on the same day as the album.
The song itself is a departure from the pop-like sounds of her previously promoted song, "Good Day" (Korean: 좋은 날; RR: Joeun Nal). It features mature vocals and a combination of piano and string instruments.[2]
IU made her promotional comeback with "Only I Didn't Know" in the television show Music Bank (KBS) on February 18, 2011, two days after the album's release.[4]
As of 2011, the album sold over 23,500 copies in South Korea.[5]
Track listing
※ Bolded tracks identify singles from the album.
CD/Digital download
No.
Title
Lyrics
Music
Length
1.
"The Story Only I Didn't Know" (나만 몰랐던 이야기; Naman Mollatdeon Iyagi)