Ah, finally a Saikano post in the new forum!
I concur with 7thMethuselah: This is a truly heartbreaking story. And I mean that in the best way possible; the characters are all finely portrayed, and through them the story cuts right through your defenses.
If you like tragedies, this is surely the
one anime to watch. So painful, yet so beautiful. Gah! Words fail me. Watch it!