URLs

• https://www.pixiv.net/users/25754
• https://www.pixiv.net/stacc/photonics
• https://twitter.com/_Photonics
• https://twitter.com/ploki999
• https://twitter.com/intent/user?user_id=734978028
• https://twitter.com/intent/user?user_id=1181551436489842690
• https://sketch.pixiv.net/@photonics
• http://photonics.web.fc2.com
• http://photonics.blog.fc2.com