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!

Our spring is still transparent
لا يزال ربيعنا شفّافاً
Nuestra juventud sigue sin color.
Nuestra juventud sigue sin color.
Nossa primavera ainda está transparente,
então vamos colocar cada vez mais cores
Весна нашей юности в разгаре,