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!

Okay. Pretend it's the real thing
and run the whole song through.
حسناً، تظاهروا أنّه عرضٌ حقيقيّ
وغنّوا الأغنية كاملة
Dann zeigt mir mal
einen ernsthaften Durchlauf.
Mettez-y du vôtre.
Faites comme si vous y étiez.
Allora,
Enfim, façam tudo para valer.
Ладно, попробуйте целиком спеть.