This is actually an intriguing anime. It starts off mysterious and game like but has a simple comedic quality that pushes it along. Normally you'd think it would be relying on the comedy too much but the way they have written the story it just flows right along with it. The visuals especially with the clothing detail is breath taking. The characters start out very well. You get good detail on them or at least a sense of who they are but in a way that doesn't break off from the story.
However just after half way that just stops. The last few episodes are more like a hurry to the edge and then it just ends.
The main question of how she got there and why isn't answered, how the main story plot is resolved and actually ends, the explanation of the newer supporting characters and why they are even there at all.
If they spent 12 more episodes on finishing the plot, merging in these new characters, answering the lingering questions and actually ending the story line it would have easily been a 10/10. However they didn't so 6/10.