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 my grandma's, I mean...
It's a relative of the principal's!
!قريبٌ لجدّتي... أقصد، إنّه قريبٌ للناظرة
Er gehört zur Familie von Oma,
äh, der Direktorin!
Es de mi abue…
¡O sea, es familia de la directora!
Es de mi abue…
¡O sea, es familia de la directora!
C’est la famille de la vioque…
Je veux dire, de la directrice !
Per la mia nonnina, cioè no...
Minha vó... Digo,
a diretora é a família dele!
Он родственник бабу... 
то есть родственник директрисы!