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!

My son sang it!
!قام ابني بتغنيتها
Das ist mein Sohn, der da singt!
La canta mi hijo.
La canta mi hijo.
C’est mon fils qui chante,
vous savez ?
Questa l'ha cantata mio figlio!
É meu filho cantando!
Её мой сын поёт.