URLs

• https://www.pixiv.net/users/725452
• https://www.pixiv.net/stacc/korosuk
• https://twitter.com/korosuk
• https://twitter.com/intent/user?user_id=23437825
• https://sketch.pixiv.net/@korosuk
• http://ycubed.web.fc2.com
• http://korosuk.hp.infoseek.co.jp