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!

If your core works, your diaphragm will too.
إن تحرّك جذعكم، سيتبعه الحجاب الحاجز
Dadurch bewegt sich euer Zwerchfell.
Los abdominales moverán el diafragma.
Los abdominales moverán el diafragma.
ensuite, faites bouger
votre diaphragme…
E se l'addome lavora, lo stesso fa il diaframma.
Там уже диафрагма заработает.