It sounds like his voice from before 2004, but more refined. At that time he had to change his style of singing because he had pushed himself too hard. Gackt has improved very much since then. I hope he will become healthy soon and he can continue to sing. :)
I've loved Tsuki no Uta since it came out. So many memories, so much nostalgia... and Gackt is as great as always. ;~; I want to watch the entire thing!