I can help you out, im a BIG BIG night head genesis fan
There is a soundtrack of some sort - its called Night Head Genesis: Toki No Mayoigo and its a DRAMA CD
i havent been able to find it on any share sites..
but i do have the full songs of both ED songs for your listening plee-sure
Under Graph - Kotoba
Aya Kamiki - Nemutteita Kimochi Nemutteita Kokoro
Night_Head_Genesis_-_Nemutteita_Kimochi,_Nemutteita_Kokoro.mp3 (
http://www.filefactory.com/file/1f3f92)<br />
Night_Head_Genesis_-_Kotoba.mp3 (
http://www.filefactory.com/file/3878e9)<br />