Personally, I find myself torn. In the technical aspects of this, you did some amazing work. The animation was excellent, good music selection, and the voice actresses did their job very well. But... I do not like Sunny. I can objectively appreciate the demon-girl turn, but not when it's against a sweet girl like Fiona who did nothing wrong. It doesn't help matters that I don't like seeing others get picked on. More and more, I find myself caught in the plight of the otaku: stuck somewhere between lust and a bleeding heart.
Personal problem aside, you have something good here, but perhaps consider doing something a little different for the next one. Don't get me wrong, I still like your work, and I look forward to the next animation.