Just a short review to pen my thoughts. I first watched this 5 years ago when it was airing. For some reason, I dropped it. I think it was because of how incohesive the story seemed to be at that time. But now, having matured, I can appreciate the story fully. Like you may have read in the Forum Discussions, many points and aspects were not explained or left to be ambiguous. But if you just thought about it, everything is actually inter-connected and the explanations are as clear as day. I've really enjoyed this anime and I think I'll pick up the LN now.