Youtube: https://youtu.be/HHPGMe7zCWM （修正版）X: https://twitter.com/YoitsuHifumi Misskey: https://misskey.io/@HifumiYoitsu NicoNico: https://www.nicovideo.jp/user/66965964/series/398695 CC-by: http://creativecommons.org/licenses/by/3.0/
http://www.nicovideo.jp/watch/sm45157084
