Artist. Formerly tagged as apty.
Artist name: 317 (reading is given as さいな, Saina)
Site name: さいなまれる。
https://www.pixiv.net/users/196404
https://www.pixiv.net/stacc/apty
https://twitter.com/317smbr
https://twitter.com/intent/user?user_id=3246939187
https://sketch.pixiv.net/@apty
http://kakunoma.web.fc2.com
http://twpf.jp/317ngtr
https://twitter.com/317ngtr
https://twitter.com/donotforget_roy
http://theinterviews.jp/317ngtr
