kotobuki_kazuki
Artist.
Japanese name: 琴吹 華月 (Kotobuki Kazuki)
The other name: ことぶき (Kotobuki)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=687555
* Tinami account: http://www.tinami.com/creator/profile/13470
* Drawr account: http://drawr.net/kotobuki-1