koketsu_(koketsu-ya)
Artist.
Japanese name: こけつ (Koketsu)
Circle name: こけつ屋 (Koketsu-ya)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=176319
* Niconico account: http://www.nicovideo.jp/user/722677
* Niconico Seiga: http://seiga.nicovideo.jp/user/illust/722677?target=illust_all
* Twitter account: http://twitter.com/koketuP
* The Doujinshi & Manga Lexicon: http://www.doujinshi.org/browse/circle/72551/