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.
There's nothing wrong with 
her having a little fun.
Ist doch nichts dabei,
wenn sie ein wenig Spaß hat.
No tiene nada de malo 
que se divierta un poco.
No tiene nada de malo 
que se divierta un poco.
Elle peut bien 
se défouler un peu…
Não há nada de errado em se divertir um pouco.