Artist.
Artist name: "Yu1" or "u1" (Yuuichi)
Circle & site name: KOTK
https://www.pixiv.net/users/85380
https://www.pixiv.net/stacc/u1ezk
https://x.com/Yu1_21
https://x.com/u1ezk
https://x.com/i/user/81345039
https://x.com/i/user/1290244055415181312
https://seiga.nicovideo.jp/user/illust/79574
http://dic.nicovideo.jp/id/4403978
http://dic.nicovideo.jp/l/yu1
https://www.nicovideo.jp/user/79574
https://nijie.info/members.php?id=2686
https://sketch.pixiv.net/@u1ezk
https://www.tinami.com/creator/profile/16579
http://c10210777.circle.ms/oc/CircleProfile.aspx
http://c10250372.circle.ms/oc/CircleProfile.aspx
http://mblg.tv/kotk
http://twpf.jp/Yu1an
https://www.pixiv.net/stacc/scout_thing
http://com.nicovideo.jp/community/co339752
http://kotk1119.blog.fc2.com
http://www.stickam.jp/profile/kotk
http://p.twipple.jp/user/Yu1an
http://p.twipple.jp/user/u1ezk
http://twitpic.com/photos/Yu1_21
http://twitpic.com/photos/Yu1an
