Whoa, that was so indescribably awesome I don't know powerful enough words to explain everything, but I will try my best.
I was literally laughing with teary eyes when there were some excellent comedy scenes after heavy drama, it's kind of funny state to be. You are forced to think sad things and at same time physically only thing you can do is laugh. Even if those are opposite emotions it's still possible to feel both. Btw Reira, I'm sure your fans love you no matter what kind of songs you make. At least I do. =)
The way plot goes now is almost too good. I hope for my own good that it doesn't go much further because then Nana starts to effect my real life too. Anime can be scary sometimes, still 18 episodes left...