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!

My boy really loves to sing.
يحبّ ابني الغناء كثيراً
Mein Sohn liebt es zu singen!
Mon fils adore chanter !
Il mio ragazzo adora cantare!
Meu filho adora cantar!
Мой сын очень любит петь.