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!

Here's your first job.
إليك عملك الأوّل
Das ist dein erster Job.
Te daré tu primera tarea.
Te daré tu primera tarea.
Voici ta première tâche :
Ecco il tuo primo compito!
É o seu primeiro trabalho.
Итак, твоя первая задача.