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.
I'm not sure why you're apologizing, 
but I'm glad it worked out.
Ich weiß nicht, warum du dich entschuldigst, 
aber gut, dass sich alles geklärt hat.
No sé de qué te disculpas, 
pero me alegra que saliera bien.
No sé por qué te disculpas, pero me 
alegro de que todo haya salido bien.
Je ne sais pas
 ce qui s’est passé après,
Não sei por que você está pedindo desculpas,
mas ainda bem que deu tudo certo.