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!

Swing low, sweet chariot
تمايلي بانخفاض أيّتها العربة الجميلة
♪ Swing low, sweet chariot ♪
Swing low, sweet chariot.
Swing low, sweet chariot.
Swing low, sweet chariot
Swing low,
Balance suavemente, querida carruagem
Едь медленно, прекрасная колесница,