Artist.
Pen-name: すみおー (Sumioo)
Old names: "Y", ニラレバ伯爵 (Nirareba Hakushaku), "fcp_Y" or "fcp-Y"
Circle name: すみっこの王様 (Sumikko no Ousama)
Joint circle name: Forest Corner Pine [FCP] (the other members: Yotsuiro_(yotsuironpasu) and Kuwata)
https://www.pixiv.net/users/1719874
https://www.pixiv.net/users/3719089
https://www.pixiv.net/stacc/vipers
https://www.pixiv.net/stacc/y_o_o_y
https://twitter.com/sumio617
https://twitter.com/intent/user?user_id=748832869
https://seiga.nicovideo.jp/user/illust/346007
https://www.nicovideo.jp/user/346007
https://nijie.info/members.php?id=314801
https://pawoo.net/@sumio617
https://pawoo.net/web/accounts/295569
https://sketch.pixiv.net/@vipers
https://sketch.pixiv.net/@y_o_o_y
https://sumio617.tumblr.com
http://sumio617.blog.fc2.com
http://yotuironpasu.blog.fc2.com
http://www.stickam.jp/profile/sumio617
http://www.stickam.jp/profile/yotuiro
http://c10083289.circle.ms/oc/CircleProfile.aspx
http://portal.circle.ms/Circle/Index/10102592
https://www.melonbooks.co.jp/detail/detail.php?product_id=218558
http://www.toranoana.jp/mailorder/article/04/0030/24/96/040030249630.html
https://twitter.com/yotuiro
http://theinterviews.jp/yotuiro
http://p.twipple.jp/user/sumio617
http://twitpic.com/photos/sumio617