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.
Even if you don't know the answer, 
at least fill in the blanks.
Auch wenn du die Antworten nicht kennst, 
versuch wenigstens, die Lücken auszufüllen.
Aunque no sepas las respuestas, al 
menos deberías llenar los espacios.
Deberías rellenar algo 
aunque no sepas las respuestas.
Même si tu ne connais pas les réponses,
 écris quelque chose !
Mesmo sem saber nada, escreva alguma resposta.