Artist, illustrator and designer.
Japanese name: ゆーげん (Yuugen)
Circle & site name: キャッスルトン
https://www.pixiv.net/users/806502
https://www.pixiv.net/stacc/yuugen_99
https://twitter.com/Yuugen_99
https://twitter.com/intent/user?user_id=133358004
https://y6b4g08x.fanbox.cc
https://www.pixiv.net/fanbox/creator/806502
https://sketch.pixiv.net/@yuugen_99
https://yuugenillust.tumblr.com
https://www.youtube.com/channel/UCdI-LZwtJ9Eh-jAVEsePQQw
https://bsky.app/profile/yuugen99.bsky.social
https://bsky.app/profile/did:plc:fbjyu6ap4ikjtqnfowkfvc6u
http://twitpic.com/photos/Yuugen_99
http://yfrog.com/user/Yuugen_99/photos
