https://www.pixiv.net/users/3090810
https://www.pixiv.net/stacc/korosuke112
https://twitter.com/2_korosuke
https://twitter.com/korogaru2gou
https://twitter.com/intent/user?user_id=2277794095
https://twitter.com/intent/user?user_id=2817137954
http://theinterviews.jp/2_korosuke
http://p.twipple.jp/user/2_korosuke
http://twitpic.com/photos/2_korosuke