Artist. Formerly tagged as maku.
Japanese name: 幕井 (Makui)
Old name: 幕の内 (Makunouchi) or まk (Mak)
Circle name: うまくいかない (Umaku Ikanai)
http://c10113263.circle.ms/oc/CircleProfile.aspx
http://c10248519.circle.ms/oc/CircleProfile.aspx
https://www.pixiv.net/users/40865
https://www.pixiv.net/stacc/maku
http://www.doujinshi.org/browse/circle/65514
http://p.twipple.jp/user/mak_pic
http://twitpic.com/photos/mak_pic
http://yfrog.com/user/mak_pic/photos