tottsuman
Artist.
Japanese name: トッツマン (Tottsuman)
The other name: トツ (Totsu)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=1255356
* Drawr account: http://drawr.net/katsuto
* Niconico account (deleted): http://www.nicovideo.jp/user/17721684
* Niconico Seiga (deleted): http://seiga.nicovideo.jp/user/illust/17721684?target=illust_all