The "elite student in music room 2" turns out to be Haruki's delinquent classmate, Kazusa Touma.  With his characteristic pushiness, he tries to get her to join the light music club.  But his pushiness backfires, and only makes her more annoyed.  Setsuna gets irritated... no, involved, and approaches Kazusa secretly.
And anyway, I don't know how you 
can still be here after being so rude.
Ich kann übrigens nicht glauben, dass du noch 
immer hier bist, nachdem du so unhöflich warst.
Además, no sé cómo puedes seguir 
aquí después de esa descortesía.
Además, no sé cómo puedes seguir 
aquí después de ser tan maleducado.
En tout cas, tu es vraiment 
sans gêne de t’incruster avec nous.
E, enfim, não sei por que você ainda está
aqui depois de tanta falta de educação.