Please rate this song from one to ten. For sake of my classmate?

My classmate asked to rate this song and I don't know what should I
rate with. It is a Japanese song and here's the link:
http://www.youtube.com/watch?v=WAROqyKzHpQfeature=autoplaylist=PL6E27AD9C55B8EA4Eindex=6playnext=1

And I need your reaction too.