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.
I'll get her to join us, no matter what.
Ich mache sie zum Mitglied,
komme, was wolle.
Haré que se nos una.
Te garantizo que se unirá.
Je la ferai rejoindre le groupe 
coûte que coûte.
Vou fazer com que ela entre.