クラベル | kuraberu | Compare
Vocal: Akatsuki Rin (暁月凛)
Producer: Last Note.

Listen: youtube (subbed), Nico Nico Douga

I subbed this video, but youtube blocked it in numerous countries, so here you go. Here are the lyrics. I personally prefer the version by Tsukinowa (月葉), which you can listen to here.

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