Artist's website: http://isaac2.web.fc2.com/
Pixiv account: http://www.pixiv.net/member.php?id=620504
https://www.pixiv.net/users/620504
https://www.pixiv.net/stacc/nishio-ykr
https://twitter.com/west24_je
https://twitter.com/intent/user?user_id=1084299400376012801
https://sketch.pixiv.net/@nishio-ykr
http://isaac2.web.fc2.com
https://twitter.com/ykr_nishi
http://p.twipple.jp/user/ykr_nishi
http://twitpic.com/photos/ykr_nishi
