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!

Hey there, boys!
!مرحباً يا فتيان
Ihr da!
¡Oigan, ustedes!
¡Eh, vosotros!
Vous deux, là !
Ehi, voi.
Vocês aí!
Эй, ребята!