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 Ratel catches cold because of me, 
Grandma's going to scold me.
إن أصاب راتل الزكام بسببي، فستوبّخني جدّتي
Wenn sich der Honigdachs erkältet,
gibt das Ärger von Oma …
Se il tasso del miele dovesse ammalarsi,
la nonnina si arrabbierebbe con me...
A vó vai ficar uma fera se eu
deixar o ratel pegar um resfriado.
Если Ратель простудится, 
бабушка меня убьёт.