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.
But doing something so important 
without talking to me or your mom first
Aber so etwas Wichtiges zu entscheiden, 
ohne vorher mit uns geredet zu haben,
Pero hacer algo tan importante sin 
hablarlo con tu madre o conmigo primero...
Pero hacer algo tan importante 
sin consultárnoslo primero...
On s’était mis d’accord
Mas você está fazendo uma coisa importante
dessas sem contar para mim nem para sua mãe...