URLs

• https://www.pixiv.net/users/97320
• https://www.pixiv.net/stacc/yudukakei
• https://twitter.com/yudukakei
• https://twitter.com/intent/user?user_id=279542513
• https://sketch.pixiv.net/@yudukakei
• http://www.geocities.jp/kei_y_hp/