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.
Do you have to butt in all the time?
Musst du die ganze Zeit dazwischenplatzen?
Debes dejar que me ocupe de las cosas.
Deja que me ocupe de mis cosas.
Ah, tu te mêles toujours 
des affaires des autres…
Deixe eu ficar com isto.