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!

Do you think he's really a teacher?
أتعتقد أنّه معلّمٌ حقّاً؟
Soll das wirklich ein Lehrer sein?
¿De verdad es profesor?
¿De verdad es profesor?
C’est vraiment un enseignant ?
Ma sarà davvero un professore?
Ele é mesmo um professor?
А он точно учитель?