Video: Fate/stay night (Anime)
Voice: Fate/stay night [Realta Nua] (PS2 Game)
Song: Disillusion
Singer: タイナカサチ (Sachi Tainaka)
with voice version: http://www.youtube.com/watch?v=vXEcyjKygjU
niconico version: http://www.nicovideo.jp/watch/sm15948734