Artist.
Names: 西之宮咲子 (Nishinomiya Sakuko), さくこ (Sakuko)
Circles: -Sakco-, はねくじら (Hane Kujira)
https://www.pixiv.net/users/1852613
https://www.pixiv.net/stacc/sakco_ffee
https://twitter.com/sakco_ffee
https://twitter.com/intent/user?user_id=145833126
https://oo0z3g8r.fanbox.cc
https://www.pixiv.net/fanbox/creator/1852613
https://sketch.pixiv.net/@sakco_ffee
https://www.tinami.com/creator/profile/13732
http://doujinshi.mugimugi.org/browse/author/5414/Ninshinomiya-Sakuko/
http://doujinshi.mugimugi.org/browse/author/86488/Sakuko/
http://www.geocities.jp/sakco_ffee/
http://www4.ocn.ne.jp/~kisekiya/
http://www.ustream.tv/channel/sakcoffeetime
