URLs

• https://www.pixiv.net/users/2396472
• https://www.pixiv.net/stacc/pianoforte_6927
• https://twitter.com/pianoOTW
• https://twitter.com/intent/user?user_id=164226614
• https://sketch.pixiv.net/@pianoforte_6927
• http://pianootw.web.fc2.com
• https://twitter.com/pianootw49