URLs

• https://www.pixiv.net/users/15281815
• https://www.pixiv.net/stacc/signalmass
• https://twitter.com/SignalMass
• https://twitter.com/intent/user?user_id=541699234
• https://seiga.nicovideo.jp/user/illust/26957104
• https://www.nicovideo.jp/user/26957104
• https://sketch.pixiv.net/@signalmass
• https://www.melonbooks.co.jp/detail/detail.php?product_id=358651
• http://peing.net/signalmass