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.
Even I sometimes do things 
you wouldn't expect!
Selbst ich mache manchmal Dinge,
die du nicht erwarten würdest!
Incluso yo hago cosas que no me espero.
Incluso yo hago cosas 
que no me espero.
Ça m’arrive d’agir sans calculer,
 de temps en temps.
Até eu, às vezes, faço coisas inesperadas!