https://www.pixiv.net/users/5740473
https://www.pixiv.net/stacc/blackgankyu
https://twitter.com/BlackGankyuu
https://twitter.com/WhiteGankyuu
https://twitter.com/intent/user?user_id=1975128296
https://twitter.com/intent/user?user_id=752845055929356292
https://misskey.io/@gannkyuu
https://misskey.io/users/9gtyb03z9h
