It's the song...
Your flash by itself is mediocre in graphics, familiar in style, and lacking in plot. Yet it's still a very interesting piece. How could this be? It's the song. The song is very good for an anime video. Well, not just the song, but the way what you did seemed to fit. Not just the movements of the characters, but the theme as well.
On the other hand, your animation is superb. Frame-by-frame with no choppy transitions or other movments is HARD to do. I've seen your others and I can tell that practice makes perfect. The animations in this flash, although not perfect (what is?), are close enough in my book. Very smooth equals very good.
As I said before, I've seen your other works. Therefore, I know you don't have a series that follows the same plot but instead make several anime-style flashes as music videos that take place in the same crazy, yet relatively cute, world. However, I believe that you've stumbled upon something here and should explore these two characters further. You may very well have the beginning to a series right in the palm of your hand. Think about it.
All in all, I think this is a great flash thats worth my time to watch and worth my time to watch again and again. I give it a 7/10. Great job.