Setsuna realizes that Haruki has been staying at Kazusa's house this whole time, and she reveals her true self to him: cowardly, introverted, and pathetic.  But Haruki accepts her as she is.  The boundary between them is broken, and the bonds between the three grow stronger as the school fair draws near.  But Kazusa is skipping sleep and food to work on her "last trick" before the school concert.
and now I have to learn 
"Sound of Destiny."
und nun muss ich „Sound 
of Destiny“ lernen.
y ahora tengo que aprender Sound of Destiny.
y ahora tengo que aprender "Sound of Destiny".
Maintenant, c’est Sound of Destiny
 qui me donne du fil à retordre.
e agora tenho que aprender a Sound of Destiny.