Artist. Has another name for NSFW works.
Japanese name: 長澤 小太郎 (Nagasawa Kotarou)
https://www.pixiv.net/users/9412990
https://www.pixiv.net/stacc/kotarou_5100
https://twitter.com/_5100
https://twitter.com/intent/user?user_id=569584246
https://seiga.nicovideo.jp/user/illust/39763682
https://www.nicovideo.jp/user/39763682
https://pawoo.net/@kotarou_5100
https://pawoo.net/web/accounts/297329
https://kotarou-5100-blog.tumblr.com
https://ask.fm/Nagasawa_5100
https://www.instagram.com/kotarou5100/
http://privatter.net/u/_5100
http://twitcasting.tv/_5100
http://www.twitcasting.tv/_5100
http://p.twipple.jp/user/_5100
http://twitpic.com/photos/_5100
