Waw.
I feel empty now.
In a good way, I mean.

used as an album cover for Pizuya's Cell + Studio "Syrup Comfiture" album "君の歌と僕の小さな恋" (Kimi no Uta to Boku no Chiisa na Koi, or 'Your Song and My Small Love')

Circle - Studio "Syrup Comfiture" and Pizuya's Cell
Album - 君の歌と僕の小さな恋
30 December 2011, Comiket 81
http://vgmdb.net/album/30914