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!

Welcome to the choir!
!مرحباً بكم للجوقة
Willkommen im Chor!
¡Bienvenidos al coro!
¡Bienvenidos al coro!
Bienvenue au club de chorale !
Benvenuti al choir club!
Bem-vindos ao clube de coral!
Добро пожаловать в хор!