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.
You're nowhere near as annoying as 
Kitahara, so don't worry about it.
Du bist nicht ansatzweise so nervig 
wie Kitahara, also keine Sorge.
No te comparas ni un poco a Kitahara, 
así que no te preocupes.
Ni te acercas a Kitahara, así que tranquila.
Concernant le deuxième point,
Você é pelo menos quatro vezes menos irritante
que o Kitahara, então não se preocupe.