Artist.
Japanese name: 川代 佑 (Kawashiro Yuu)
The other name: YU-KWS
https://www.pixiv.net/users/271070
https://www.pixiv.net/stacc/yu-kws
https://twitter.com/yu_kws
https://twitter.com/intent/user?user_id=48184950
https://seiga.nicovideo.jp/user/illust/788670
https://www.nicovideo.jp/user/788670
https://sketch.pixiv.net/@yu-kws
https://www.tinami.com/creator/profile/23732
http://privatter.net/u/yu_kws
http://twitpic.com/photos/yu_kws