URLs

• https://www.pixiv.net/users/868139
• https://www.pixiv.net/stacc/yukikomatsu
• https://twitter.com/tasuki_seiichi
• https://twitter.com/intent/user?user_id=325375312
• https://pawoo.net/@tasuki_seiichi
• https://sketch.pixiv.net/@yukikomatsu
• http://www.melonbooks.com/index.php?main_page=product_info&products_id=IT0000201736