�Eternal Blue,� the song is sung by Sachiko Hara.

https://www.youtube.com/watch?v=D7eI0eQtiYM#t=94

starts around 1 min mark and ends at around 5 min mark it would awesome someone could rip JUST that song off of that video if possible just don't know if they going add this english song to the OST since this song was used in U.S promotional purposes i believe