The nudity was not overdone in a "fan-service" kind of way. It seemed to go along with the plot well.
Now, the story is absolutely creative. And, in only 13 episodes, somehow they develop it into an amazing climatic masterpiece.
Same with the characters. All of the main ones get their own development. Of course, the main ones, like Kouta and Nyu/Lucy go more in depth a bit.
I still do not understand how they can make an anime, have you hooked in 1-2 episodes, develop characters and plot, have a creative story, an intense ending that is, again, beautiful, in just 13 flippin episodes.
This would probably best be described as a tragic sort of anime. Just the style and the way things are done. But the emotions run high and I became probably way too attacked by the end.
This will probably remain high on my list of favorite animes.
