Kumiko enters Kitauji High School having been unable to forget what Reina said at a middle school concert band competition. She goes to visit the concert band at school along with classmates Hazuki and Sapphire, where they meet Reina again.
And don't open the door without asking.
ولا تفتحي الباب قبل السؤال
Und klopf wenigstens an.
Y no entres sin tocar.
Y no entres sin llamar.
Et n’entre pas sans frapper.
e non aprire la porta senza bussare.
E não abra a porta sem bater.