Here I Am
Here I am from Secret Garden (시크릿 가든) OST Special by 4MEN & (美).
Eternal Love
Eternal Love from Healer OST by Michael Learns To Rock. Released: 2015.
Tears Fall
Tears Fall from Angel Eyes OST by Kim Tae Hyun.
Fox Rain
Fox Rain from My Girlfriend Is A Gumiho OST by Fallin Starz.
Gi Do
Gi Do from Autumn In My Heart OST by Jung Il Young. Released: 2001.