2006
Han Sarammaneul (The One I Love), da OST de Hyena – 29.11.2006
2007
Just You, da OST de Billy Jean Look at Me – 24.01.2007
2011
2012
Reminiscence – 13.01.2012 (Colaboração com Yoon Il Sang para o álbum “Yoon Il Sang’s 21st Anniversary Album”)
2013
Promise You (Versão 1) – 22.01.2013
Promise You (Versão 2) – 22.01.2013
Hanamizuki – 24.07.2013
2015
Join Hands 05.08.2015
2020
When We Were Us – 08-06-2020
Traveler – 28.10.2020
2021
Shadow of You (The King’s Affection – OST) – 12.10.2021