踏めば助かるのに...原曲 https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.youtube.com/watch%3Fv%3D5bz-FNeF9dY&ved=2ahUKEwjLpf3R8sKGAxWdslYBHQJRCuoQ78AJegQIKBAB&usg=AOvVaw2jTVgnS896PBFYzZEZSQXH
http://www.nicovideo.jp/watch/sm43875721
