Hey guys, do any of you have Sunflower OST to the movie staring Kim Rae Won? Because I've been looking all over for it and can't find it.

One song in particular I am looking for and I have no idea what its called is in the second half of the trailer.

Trailer
http://www.youtube.com/watch?v=OT84yj0LtJQ

Heres the music video
http://www.youtube.com/watch?v=16mGBwIu-c0

Anyone?