NEED HELP:Who doesn't l’amour Vampire Knight? It's so awesome, and so is the soundtrack, which is why I bought it, but there is one song-ONE SONG-that made me bUY the soundtrack in the first place, I listened to EVERY track and IT'S NOT THERE!

PLEASE PLEASE PLEASE PLEASE PLEASE!! CAN SOMEONE TELL ME THE NAME OF THE SONG--example: Episode 13 of Vampire Knight Season One around 15:11/24:03-- that small hum-beat sound strings while explaining about Hiou Shizuka's situation, while Aidou is on the bridge with the water. link