Artist.
Japanese nickname: 夜ふかし ("Yofukashi", lit. "staying up late")
Circle: はっぴぃどらいぶっ！
https://www.pixiv.net/users/463874
https://www.pixiv.net/stacc/yohukasi
https://twitter.com/yohukasi
https://twitter.com/intent/user?user_id=39403868
https://sketch.pixiv.net/@yohukasi
http://pantubisyobisyo.blog.fc2.com
http://mixi.jp/show_profile.pl?id=8627831
http://c10014909.circle.ms/oc/CircleProfile.aspx
http://happy-drive.hp.infoseek.co.jp
http://twitpic.com/photos/yohukasi
http://yfrog.com/user/yohukasi/photos