URLs

• https://www.pixiv.net/users/3348773
• https://www.pixiv.net/users/13396454
• https://www.pixiv.net/stacc/muk_r
• https://www.pixiv.net/stacc/usu_t
• https://twitter.com/_usu
• https://twitter.com/muk_r
• https://twitter.com/intent/user?user_id=29118351
• https://twitter.com/intent/user?user_id=749654682230861824
• http://mortar.sakura.ne.jp/tb/
• http://twpf.jp/_usu