For anyone who love The song in this film
http://imusic.teenee.com/2/frame/2064.php
This song is call "Gorn" in Thai which mean "Before" in English By Modern Dog.
And this is another song by them.
http://www.thaihealth.net/music/modules.php?name=News&file=article&sid=14
Or You can select the song by yourself (If you can read thai)
http://imusic.teenee.com/musicinartist.php?artistid=327
Info of Modern Dog
http://www.bakerymusic.com/artists/moderndog.html
Both song is in 1st Album
P.S. Sorry for my Bad English. Just want to give info
Bangkok Thailand