I haven't seen the movie and I don't know what the featured song for the movie is even though I love the composer, but I gave it a shot on google. Here's what I could find
here's a song from the movie I could find on youtube, dunno if it's the title song.
If you are truly desperate for that song and still have a CD player around, I also found it for sale on amazon
While digging a little deeper, I also found this chinese website that seems to have the entire CD online. It seems to be available for download as well and seems to have all the 32 songs, you can either on the little square with the headphones to listen to a song one by one, or you can scroll to the bottom of the songlist, click on the slight orange button to automatically queue all songs into one playlist to listen to
I also found that they have it on mnet if you're more comfortable using a korean website. I find it a lot more difficult to navigate but your korean might be better than mine or you might be using IE, with chrome it's asking for too many add-on. anyway's here's the link
I haven't seen the movie and I don't know what the featured song for the movie is even though I love the composer, but I gave it a shot on google. Here's what I could find
Hope this was helpful!