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 you must know about her, right?
Selbst du müsstest sie doch kennen, oder?
Incluso tú la conoces, ¿no?
Incluso a ti te sonará, ¿no?
Même toi,
 tu dois la connaître.
Até você conhece ela de nome, né, Haruki?