音楽のみ CC BY 3.0DL: https://www.dropbox.com/scl/fi/q8x1lj7n5wronhfgezicn/.mp3?rlkey=wi1gfkrcr1s43rsitch31y9fi&st=3yekq1d4&dl=0
http://www.nicovideo.jp/watch/sm44389386
