Hello, I have been searching forever (approximately 6+ months) for a specific version of "Ama no Jaku" sung by Gumi, and i have yet to stumble upon it. If anybody would be kind enough to find or transcribe it much would be appreciated :D. Down below is the specific version that i would like, and I do believe that it is a duet.

http://www.nicovideo.jp/watch/sm15286222
http://www.youtube.com/watch?v=Ys2RRTwFvM8