Artist. Formerly tagged as ironmonkey.
Japanese name: 火星 ユキミツ (Kasei Yukimitsu)
Pixiv nickname: kasei
Circle & site name: "Billy what wild cool night" or ビリーは悪くない
https://www.pixiv.net/users/5179
https://www.pixiv.net/stacc/ironmonkey
https://twitter.com/kaseiyukimitsu
https://twitter.com/intent/user?user_id=66168904
https://pawoo.net/@kaseiyukimitsu
https://pawoo.net/web/accounts/34028
https://dlik1kbc.fanbox.cc
https://sketch.pixiv.net/@ironmonkey
https://skeb.jp/@kaseiyukimitsu
http://fosingh.hp.infoseek.co.jp
http://twitpic.com/photos/kaseiyukimitsu