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!

Cardbocchi-kun! What's wrong with you?
صندوتشي-كن! ما خطبك؟
Was ist los, Studiobox-kun?
Warum gehst du einfach?
¿Qué te pasa, Cartoncito?
¿Qué te pasa, Cartoncito?
Qu’est-ce que t’as, M. Cabine ?
Pourquoi tu pars ?
Danbocchi,
Papelão, o que foi isso?
Коробочка! Ты чего?