https://www.pixiv.net/users/76092022
https://www.pixiv.net/stacc/user_mpyx4378
https://twitter.com/kotaro_otn
https://twitter.com/intent/user?user_id=1471761417737236487
https://kotaro-otn.booth.pm
https://fantia.jp/fanclubs/390823
https://fantia.jp/otnkoukoku
https://kotaro-otn.fanbox.cc
https://www.pixiv.net/fanbox/creator/76092022
https://skeb.jp/@kotaro_otn
https://misskey.io/@kotaro_otn
https://misskey.io/users/9gwac82rjy
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG68679.html
https://www.melonbooks.co.jp/circle/index.php?circle_id=111871
https://bsky.app/profile/kotarootn.bsky.social
https://bsky.app/profile/did:plc:kcywcqbmkoazqn3pocc5zov6
https://www.dmm.co.jp/dc/doujin/-/list/=/article=maker/id=205302/
https://onaco.jp/profile/kotaro_otn
