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.
It hasn't even been a week 
since you asked me to join.
Es ist nicht mal 'ne Woche her, 
seit du mich gefragt hast, ob ich beitrete.
Ni siquiera hace una semana que se unió.
Solo ha pasado una semana desde 
que me pediste que me uniera.
Ça ne fait même pas une semaine 
qu’elle est dans ton club,
Não se passou nem uma semana
desde que você pediu para eu entrar.