i love the end of it, it just makes you sad and happy, it gives you this rare "void" feeling, like you cant find anything to replace it, you hate the feeling, yet you are always trying to get the feeling again and again. When you find a anime/manga that makes you fell this "void" feeling, you feel like you can no longer just watch/read it just for fun. Its either that or you have to watch/read it again and again to truly finish it.