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!

and serve as its advisor for a full year,
،وعملت كمرشدها لمدّة عامٍ كامل
und ihn ein Jahr lang übernehmen,
et à leur faire cours correctement,
portando a termine una consulenza di un anno,
e ficar como conselheiro por 1 ano,
его руководителем год,