what do i do by ji sun ( BOF OST)

i really love this song. . i play it over and over again. . jae kyung really had done all things to make jun pyo fall for her but jun pyo really love jan di. . jae kyung is a very good person. . sacrificing is not that easy, especially when you really wanted and loved what you ll gonna give up. . jae kyung fighting thanks for ur comments for watching. . rate the video. CREDITS:summerxsummer0 (well, i m sorry, i forgot. all