URLs

• https://seiga.nicovideo.jp/user/illust/31629062
• https://www.nicovideo.jp/user/31629062
• https://koppeosechi.tumblr.com
• http://koppeosechi.moo.jp/home/
• https://www.pixiv.net/users/7525388
• https://www.pixiv.net/stacc/koppe_nikonama
• https://twitter.com/koppeiraira
• https://twitter.com/koppeosechi