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!

When you sing, you see,
you want to inhale from your abdomen.
عندما تغنّي، عليك الاستنشاق من معدتك
Beim Singen atmet man in den Bauch
Pour chanter, on a besoin
d’expirer avec son ventre
Vedi, nel canto bisogna prima inalare
usando tutto l'addome
Ao cantar, é preciso colocar ar
na barriga e também nas costas.
Но при пении дыши лучше через живот.