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.
If nothing else, I can guarantee I'm 
further along than our guitar player.
Ich kann garantieren, dass ich weiter 
als unser Gitarrenspieler bin.
Si acaso, garantizo que voy más 
adelantado que el guitarrista.
Al menos puedo garantizar que voy 
por delante de nuestro guitarrista.
Je suis même sûr de progresser
 plus vite que toi à la guitare !
Pelo menos eu sei que avancei
mais que a sua guitarra.