The group trains so that everyone can pair with any other team member and use their powerful Unison attacks. But Shirabe is having trouble pairing up with anybody but Kirika, because of her inability to trust others.
Let us go forward, 
remembering to sing together
فلنندفع إلى الأمام ونتذكّر غناءنا معاً
Schreiten wir voran,
erinnern wir uns an unser Duett.
Avanzaremos sin olvidar armonizarnos
Avanzaremos sin olvidar armonizarnos
On avancera toujours…
Uniamo insieme le nostre voci e andiamo avanti
Sem esquecer de harmonizar,
nós vamos avançar
Будем идти вперёд,
не забывая вместе петь.