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!

Showering, I'd say.
يستحمّون كما أظنّ
Ich glaube, sie duschen.
Se están duchando.
Diría que se están duchando.
Ils prennent leur douche.
La doccia, non è evidente?
Parece ser um banho.
Думаю, они принимают душ.