I finished!
I wrote down the sheet music fro Shiawase no Kakera, a really cute track from the movie's OST.
I used this video for reference, because I can't transcribe anything by ear except for a simple melody line.
http://www.nicovideo.jp/watch/sm16479167And here's the link to the sheet music, if there are any piano players out there that would like to learn it. It's really simple, yet pretty.
http://www.noteflight.com/scores/view/41aa295745b232a9b1a3ea96a8f0eeb7afc59d68