落ち着こう原曲ダウンロードできます: https://www.mediafire.com/file/b5l5q1hjvcptpmn/%25E3%2582%2582%25E3%2581%25AB%25E3%2582%2587%25E3%2582%2582%25E3%2581%25AB%25E3%2582%2587%2528off_Vocal%2529_165BPM.wav/file
http://www.nicovideo.jp/watch/sm44732299
