Artist.
Japanese name: 牛乳 (Gyuunyuu)
The other name: 牛乳左衛門 (Gyuunyuuzaemon)
Circle name: script.
https://www.pixiv.net/users/1204474
https://www.pixiv.net/stacc/cat-on-moon
https://twitter.com/L4Cat
https://twitter.com/intent/user?user_id=219911481
https://seiga.nicovideo.jp/user/illust/225578
http://com.nicovideo.jp/community/co1116274
https://www.nicovideo.jp/user/225578
https://pawoo.net/@L4Cat
https://pawoo.net/web/accounts/38697
https://l4cat.fanbox.cc
https://sketch.pixiv.net/@cat-on-moon
https://www.tinami.com/creator/profile/47901
http://privatter.net/u/L4Cat
http://enty.jp/milk_factory
http://p.twipple.jp/user/L4Cat
http://twitpic.com/photos/L4Cat