This is a remix of Touhou 6 - The Embodiment of Scarlet Devil's Staff Roll Theme, done by Demetori. It's from the album 如臨深遠 ～雨縒煙柳～ (Sinen ni Nozomu ga Gotoshi).
The picture is of Flandre Scarlet on the left, and Remilia Scarlet on the right.
Download the song here: http://www.mediafire.com/?qjnnymljh1w
Grab the image here: http://danbooru.donmai.us/post/show/479104