I accidentally came upon this anime and the description I read (and a spoiler-y review) convinced me to watch it.
After the first episode I was instantly charmed by the artwork which reminded me strongly of K-ON, animation, soundtrack and the story line. It's a slow paced anime so I hoped that the exposition will take time and it will end in a bang. My theory of course was incorrect because the anime was segmented into three main story-lines that were not of equal footing. Personally I thought that if the anime ended after the first ten episodes it would have still remained a good anime.
The first story was so good that anything following it just seemed to fall flat and the character development was very slow. I suppose it's possible to read into it but I expected something more on the character level of the anime.
However what really got me into this anime was the feeling I got while watching this anime. A strong sense of strangeness and other-ness wrapped around the existing world, something similar to xxxHolic and Sayonara Zetsubou-sensei, even 24 Club manga, where you have a feeling you will fall on your head any moment. I enjoyed the intelligence of the main character and his interaction with his best friend. How the anime was set up, I expected something more sinister however, something we don't get even with the abundance of jealousy and loneliness present.
The ending is in the same level of disappointment. It's anti-climatic and completely unrelated to the main-plot of the anime, the mystery, as if it was forgotten in favor of the subplot. I can't say that I don't like how love is presented in this anime, rather normally considering other anime with a few exceptions, but exactly because of that it should not have been the main focus. Truly a disappointment to the anime that started very good then kept falling and dragging out until I had to fast-forward a couple of times just to see something happen.
Overall, I enjoyed many separate aspects of the anime, however nothing can compensate for me being bored by it especially considering it's supposed to be a mystery anime.