Tenshi, Ei-chan, and Shiratori all attend Kawagoe Academy. One day, they get pulled into the orbit of former conductor Haruo. He drags them into his newly founded boys choir where they suddenly find themselves performing a song in front of an audience!

Your life depends on the score!
!تعتمد حياتك على القطعة الموسيقيّة
Das Leben ist wie ein Notenblatt.
La vida depende de la partitura.
La vida depende de la partitura.
Nos vies dépendent de partitions.
E la vita dipende dalla partitura.
A vida é uma partitura que você escreve!
Твоя жизнь  — тоже ноты!