Artist. Formerly tagged as oka (pixiv36449).
Artist name: oka
Other nickname / pixiv ID: okamuamu
Twitter ID: umanihiki
https://www.pixiv.net/users/36449
https://www.pixiv.net/stacc/okamuamu
https://twitter.com/oka_madomagi
https://twitter.com/umanihiki
https://twitter.com/intent/user?user_id=129816266
https://twitter.com/intent/user?user_id=3251562301
https://sketch.pixiv.net/@okamuamu
http://twitpic.com/photos/umanihiki
