The choir heads into the mountains for a singing training camp, but when they arrive, they discover that the site they'd reserved is already being used by a rival school! Meanwhile, Haruo refuses to do anything but...look for kabocha squash?
Because we sang all night 
to write the lyrics.
ذلك لأنّنا غنّينا طوال الليل لكتابة الكلمات
Ich habe die ganze Nacht
beim Schreiben gesungen.
Es que cantamos toda la noche
para componerla.
Es que hemos cantado mucho
para componerla.
On les a écrites
en chantant toute la nuit.
Siamo rimasti svegli a cantare tutta la notte.
Bem, a gente virou a noite
cantando e escrevendo a letra.
Просто мы пропевали текст на пробу.