https://www.pixiv.net/users/1583042
https://www.pixiv.net/stacc/aoakaflag
https://twitter.com/yu_aoaka
https://twitter.com/intent/user?user_id=124807232
https://seiga.nicovideo.jp/user/illust/1600087
https://www.nicovideo.jp/user/1600087
https://sketch.pixiv.net/@aoakaflag
http://p.twipple.jp/user/yu_aoaka
http://twitpic.com/photos/yu_aoaka
http://yfrog.com/user/yu_aoaka/photos