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!

Today's another day
اليوم يومٌ آخر
Hoy es hoy y mañana será mañana
Hoy es hoy y mañana será mañana
Hier comme aujourd’hui
On finit toujours ici
Oggi è oggi.
Сегодня обычный день