URLs

• https://www.pixiv.net/users/714605
• https://www.pixiv.net/stacc/usaginohaka
• https://twitter.com/usatsukaeiji
• https://twitter.com/intent/user?user_id=67645802
• https://sketch.pixiv.net/@usaginohaka
• https://do-raku7.tumblr.com
• http://doujinshi.mugimugi.org/browse/author/21667/Usazuka-Eiji/
• http://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/creater.php?creater=5018
• http://www.geocities.co.jp/douraku_7/
• http://www.geocities.jp/douraku_7/
• http://do-raku7.blog.so-net.ne.jp
• http://do-raku7.blog.so-net.ne.jp/_images/blog/_50f/do-raku7/