I really like the preview, it sounds so emotional and sad. I also agree that it has it's own style/uniqueness to it. But her voice is higher like the old days...which is not bad, because it's not an extreme high pitch as it was back then. I cannot wait for the full version of this song. ^^
I, personally, would love it if Ayu pumped out a rock album!!
With the exception of glitter, it seems like there will be a lot of rock inspired tracks on this album.