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!

Wh-Wh-What are you doing?!
ما-ما-ما الذي تفعلونه؟
W-Was macht ihr da?!
¿Qué están haciendo?
¿Qué hacéis?
Qu’est-ce que vous faites ?
M-M-M-Ma che state facendo?!
O que vocês estão fazendo?
Ч-ч-что тут происходит?!