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!

You! Even if your voice changes, 
you'll be a tenor, right?
،يا فتى! حتّى لو تغيّر صوتك،
سيكون صادحاً، صحيح؟
Trotz Stimmbruch bist du ein Tenor, oder?
Aunque te cambie la voz,
serás tenor, ¿verdad?
Aunque te cambie la voz,
serás tenor, ¿verdad?
Tu as beau forcer sur ta voix,
tu es un ténor.
Anche se stai cambiando la voce, tu sei un tenore.
Mesmo com a mudança
de voz, você é tenor, né?
Так! Голос чуть поменялся,
 но всё равно тенор.