It's time for the choir to start rehearsing in earnest, but the AC is broken and it's too hot to think. They move to somewhere cooler, and Rika gives them a song to hone their rhythm. Then, they're swept up in a series of inexplicable events!
Good idea. If we don't know our way around 
the song, we'll never know what it's missing.
،معك حقّ، إذا لم نتقن جوانب الأغنية
فلن نعرف ما ينقصها
Hai ragione, se non facciamo
completamente nostro questo brano,
Tem razão. Enquanto não soubermos
o que queremos com a música,
Отличная мысль. Пока не попробуем,
не поймём, чего нам не хватает.