URLs

• https://www.pixiv.net/users/67747
• https://www.pixiv.net/stacc/retro_block
• https://twitter.com/Retro_block
• https://twitter.com/usuduku
• https://twitter.com/intent/user?user_id=114225050
• https://twitter.com/intent/user?user_id=756358005311041536
• https://sketch.pixiv.net/@retro_block
• http://retroblock.web.fc2.com
• http://usduku.blog.fc2.com
• http://twitpic.com/photos/usuduku