参考: https://youtu.be/w0PcLsk2U2E?feature=shared https://www.youtube.com/watch?v=zgrap9KRmbE&t=0s 元曲: https://www.youtube.com/watch?v=0nlNyxTtz7w&t=0s
http://www.nicovideo.jp/watch/sm44724110
![[音MAD] Ray of Keyboard](https://nicovideo.cdn.nimg.jp/thumbnails/44724110/44724110.93546217)