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.
You sure your opinion isn't a little biased?
Sicher, dass du nicht 
ein wenig parteiisch bist?
¿Seguro que no piensas eso porque te gusta?
¿Seguro que no lo dices porque te gusta?
Será que você não pensa assim
só porque tem uma quedinha?