After listening to it after a couple of times...
I really like it. The refren is very nice, and when I heard it for the first time I wasn't impressed at all and I even thought that I might not like it. Even though this isn't the whole HQ song, it's enough for me to judge it.
The only and weird I don't like - Ayu's voice. To me seems like she's straining and it's frustrating. The music is very beautiful, even though it's nothing new from her discography.