Artist, probably a futaba channel denizen.
Japanese name: はるき (Haruki)
https://www.pixiv.net/users/147613
https://www.pixiv.net/stacc/mermaid_tears
https://twitter.com/Haruki_DoS
https://twitter.com/intent/user?user_id=81814330
https://pawoo.net/@mermaid_tears
https://qttbpxtr.fanbox.cc
https://www.pixiv.net/fanbox/creator/147613
https://sketch.pixiv.net/@mermaid_tears
http://twitpic.com/photos/haruki_dos