The song is on the album I've Girl's Compilation (vol. 6) and you can get it from here:
http://www.megaupload.com/?d=4SMB9MW0
This was upped by someone else so Thanks to whoever you are.
Heres the full tracklist:
01. Eiko Shimamiya - Automaton
02. KOTOKO - Abyss
03. Mami Kawada - IMMORAL
04. Kaori Utatsuki - Do you know the magic
05. MOMO - philosophy
06. KOTOKO - We Survive
07. MELL - Permit
08. KOTOKO - Lupe
09. SHIHO - Kiss the Future
10. MELL - Egen
11. KOTOKO - Imaginary affair
12. Mami Kawada - eclipse
13. KOTOKO - Trust You're Truth
14. KOTOKO - Collective