Artist.
Japanese name: 関 (せき, Seki)
Old names: らっきょ (Rakkyo) or 栖山 (Suyama)
Circle name: 月福食堂 (Geppuku Shokudou)
https://www.pixiv.net/users/2278190
https://www.pixiv.net/users/13469632
https://www.pixiv.net/stacc/abcd_efgg
https://www.pixiv.net/stacc/signamrijp
https://twitter.com/seki_hqac
https://twitter.com/seki_nn
https://twitter.com/intent/user?user_id=2963401315
https://twitter.com/intent/user?user_id=4667828952
https://sketch.pixiv.net/@abcd_efgg
https://sketch.pixiv.net/@signamrijp
http://privatter.net/u/d_abce
https://twitter.com/d_abce
http://p.twipple.jp/user/rakkyo_01
http://twitpic.com/photos/rakkyo_0
http://twitpic.com/photos/rakkyo_01
http://yfrog.com/user/rakkyo_01/photos