jaejoong 015
jaejoong 015
"I'll Protect You", sang by Jaejoong for the Korean drama Protect the Boss is highly impressive.  At least, that's the general consensus around the web at the 3rd song for drama OSTs sang by a JYJ member.  

Both Yoocheon and Junsu has also released a song for a different drama and all three songs have dominated the online charts in Korea recently.