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!

I don't sing in front of people.
لا أغنّي أمام الناس
Ich kann nicht vor anderen singen.
Yo no canto delante de nadie.
Yo no canto delante de nadie.
Je n’aime pas chanter
devant les autres.
Io in pubblico
Eu não canto na frente dos outros.
Я на публику не пою.