https://www.pixiv.net/users/45036835
https://www.pixiv.net/stacc/user_gjte2588
https://twitter.com/KeitarouT
https://twitter.com/intent/user?user_id=462768842
https://ponpononline.booth.pm
https://ponpondoonline.fanbox.cc
https://www.pixiv.net/fanbox/creator/45036835
https://sketch.pixiv.net/@user_gjte2588
http://tthtk.blog.fc2.com
https://www.amazon.co.jp/-/e/B003UWSZFM/
https://www.mangaupdates.com/author/yrj2xag
https://www.mangaupdates.com/authors.html?id=2959
https://en.wikipedia.org/wiki/Keitaro_Takahashi
https://ja.wikipedia.org/wiki/高橋慶太郎
https://www.animenewsnetwork.com/encyclopedia/people.php?id=76554
https://www.mobygames.com/person/1204160
https://myanimelist.net/people/4091
http://twitpic.com/photos/KeitarouT
