https://www.pixiv.net/users/1055910
https://www.pixiv.net/stacc/ahs-seven-love
https://seiga.nicovideo.jp/user/illust/13274438
https://dic.nicovideo.jp/id/4189041
https://dic.nicovideo.jp/u/13274438
https://www.nicovideo.jp/user/13274438
https://mixi.jp/show_profile.pl?id=23385658
https://twitter.com/yukitachika
https://com.nicovideo.jp/community/co1386570
http://twitpic.com/photos/yukitachika
