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!

It's okay. Ordinary people don't catch colds.
لا تقلقوا، لا يُصاب الأشخاص العاديّون بالزكام
Alles gut! Normalos
können sich nicht erkälten.
Tranquilos.
La gente normal no se resfría.
Tranquilos.
La gente normal no se resfría.
C’est rien,
les roturiers tombent pas malades.
Va tutto bene, le persone comuni
non prendono il raffreddore.
Não se preocupem,
gente ordinária não pega resfriado.
Не бойтесь. Вы не Ратель, 
не простудитесь!