looking for a movie...

I'm trying to find a movie that I saw part of. it was a foreign movie (somewhere in asia) that took place in a musical highschool about a boy and a girl that that fall in love but, the twist is that the girl is from 20 years in the past from the boys present and she is able to see the boy by playing a special song she found that allows her to travel through time. I think the movie was called "secret" but I'm not sure, and have not had much luck searching on my own, anyone else know what I'm talking about and know where to download a copy?

Eventually found the movie, it is called "secret" could also be translated to "a secret that cannot be told" released in 2007. this thread no longer serves a purpose, unless those that have seen the movie wish to discuss it.