Ok.... the song is pretty new as far as I know. The only clues I have are, there's definitely a chick singing at some point. Possibly a male at another point. I'm not 100% sure about the male though. Also, from the Seotaiji & Boys song, Hayoga, the instrumental part where there's like... a snake charmer's flute playing or something, something a lot like that pops up a few times in this song too. I actually that the song was Hayoga until they started singing. I'm running through every song in Korea's top 50 chart, and still haven't found it.  Apparently the instrument is called a taepyeongso.