https://www.pixiv.net/users/3731054
https://www.pixiv.net/stacc/yellow_cc
https://twitter.com/20day_cc
https://twitter.com/hatsuka_cc
https://twitter.com/intent/user?user_id=416371313
https://twitter.com/intent/user?user_id=899983050
https://sketch.pixiv.net/@yellow_cc
http://yfrog.com/user/20day_cc/photos
