Haibane Renmei is something really unusual in the anime world.
Anime is almost always created with fun for the audience as its prime goal. That's fine. That's it's media niche. But sometimes an unusual creator get to realize a private vision of his in an anime, and something extraordinary results.
This anime is one of those times. And it does nothing less than take on fundamental recurring issues of human life—in this case, how do we deal with the Awful Threesome: shame, guilt, and despair. I couldn't believe all that could have been gotten into a fun genre, but here it really has been.
At the same time, the story is told employing engaging characters in a mysterious setting. I loved it all the way!.