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.
Are you back to lecture me again?
Willst du mir wieder 'ne Standpauke halten?
¿Viniste a regañarme de nuevo?
¿Has venido para echarme otro sermón?
Tu viens me faire la morale, 
comme à ton habitude ?
Vai me dar sermão de novo?