URLs

• https://www.pixiv.net/users/816377
• https://www.pixiv.net/stacc/kouinya
• https://sketch.pixiv.net/@kouinya
• http://www.stickam.jp/profile/hekino_hayate
• https://twitter.com/hekino_hayate
• https://twitter.com/kuon_roten
• https://twitter.com/roten_i
• http://kouinyanext.blog.fc2.com
• http://twitpic.com/photos/hekino_hayate
• http://twitpic.com/photos/roten_i
• http://twitpic.com/photos/roten_im