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.
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¿Cómo entraste?
¿Cómo has entrado?
Comment as-tu fait 
pour entrer ?
Como você entrou aqui?