Artist.
Artist name: 53 (reading seems to be Goosan)
The other names: ごーさん (Goosan) or ⅤⅢ
Circle name: High & High!
Site name: まだなんにも決まってない
https://www.pixiv.net/users/18342
https://www.pixiv.net/stacc/yama-jyun
https://twitter.com/gosann
https://twitter.com/gosann53
https://twitter.com/intent/user?user_id=1387130612
https://twitter.com/intent/user?user_id=1301189794530078721
https://nijie.info/members.php?id=10415
https://sketch.pixiv.net/@yama-jyun
https://skeb.jp/@gosann53
http://53mitei.blog.fc2.com
http://twitpic.com/photos/Gosann
