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!

Not that I have any intention 
of teaching you.
ليس كأنّي أمتلك نيّة بتعليمكم
Aber ich habe nicht vor,
euch dorthin zu führen.
Aunque no pienso enseñarles.
Aunque no pienso enseñaros, ¿vale?
Mais bon,
j’ai la flemme de vous former.
Beh, ma io non ho voglia di insegnarvi.
Bem, mas não tenho a
menor vontade de ensinar...
Хотя я вас учить, конечно, не буду.