Song: Just Be Friends
Instrument: Piano Solo and Piano + Vocal (2 arrangements with Piano Solo as priority please)
Version (search youtube name): 【Just Be Friends】のピアノVerを歌ってみた【蓮】 (7:05 min) --> check description, link provided

I know there is another arrangement of this song but I like this arrangement better; I think it's the key difference. The handling of the ending in Ren's version is better than the other piano version. Please base your arrangement on this version. Thank you!

EDIT: here's the link to the version I want.
http://www.youtube.com/watch?v=LzYDKlwhxlo

http://micandonburi.web.fc2.com/e.html

I'm not sure if this is exactly what you wanted, but this site has a lot of Vocaloid music. Just be friends is #45, but it's by Luka, not Ren. It has both a piano solo version and one with vocals, but the solo doesn't have a midi or mp3 for it. I hope this works for you.

That was the one I found. I didn't like the way it was arranged and the piano version on that site is...incomplete. The song was originally Luka, but Ren is a real person singing a cover of JBF.

I agree. The Micandonburi version has a lovely jazz version, and an original with vocals, but I think what Kotsuki is looking for is more... feeling and flowing. Y'know, solid. I hope you can find your sheet music! I for one would love to see it in PDF form. :)

Thanks Sunny-daze~ I hope so too. Well, someone will have to transcribe it.

By the way, does anyone know the key? Is it really in F+? That would be of great help if anyone knew.