ぴえん本編 https://www.youtube.com/watch?v=ciK4-hxpFWI&ab_channel=%E9%9B%AA%E5%9F%8E%E7%9C%9E%E5%B0%8B%2FYukishiroMahiro%E3%80%90%E3%81%AB%E3%81%98%E3%81%95%E3%82%93%E3%81%98%E6%89%80%E5%B1%9E%E3%80%91
http://www.nicovideo.jp/watch/sm37574753
