Simply Original
While your drawing and animating skills have room for improvement, the music and the original story were quite captivating and made for an enjoyable few minutes. However, I'm a little disappointed at the lack of an ending, but if your goal is to build anticipation for another installment, you nailed it.
I DO hope you plan to finish the story, I want to see if the clever fox finds a way to free the angel. Can't say he didn't try... (Blowtorch and explosives? Hilarious!)