I U (stylized as I U) is the first Japanese extended play by South Korean singer-songwriter IU, released on December 14, 2011. It was IU's first release in the Japanese domestic market and was a selection of remastered versions from her original Korean discography of Korean-language songs released between 2008 and 2011.
II. Track Listing
|1||Good Day||Kim Eana||Lee Min-soo||3:56|
|2||Nagging (with Im Seulong)||Kim Eana||Lee Min-soo||3:50|
|4||Lost Child||Choi Gap-won||Lee Jong Hoon, Min Woong Sik||3:44|
|5||Only I Didn't Know||Kim Eana||Yoon Sang||3:27|
|6||Last Fantasy (Bonus Track)||Kim Eana||Kim Hyeong-seok||6:10|