Artist. Possibly the same person with an eromangaka who is working on Core Magazine's Comic HotMilk.
Japanese name: 桐山 (Kiriyama)
https://www.pixiv.net/users/2982439
https://www.pixiv.net/stacc/yamadakarif
https://twitter.com/kanasebench
https://twitter.com/kiriyama_k
https://twitter.com/intent/user?user_id=955893595
https://twitter.com/intent/user?user_id=1044877557211058176
https://pawoo.net/@kiriyamakz
https://pawoo.net/web/accounts/183549
https://sketch.pixiv.net/@yamadakarif
https://www.pixiv.net/stacc/kiriyamakz
http://twitpic.com/photos/kiriyama_k
