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 might not be sweet enough 
for you, Touma-san.
Vielleicht ist es dir nicht 
süß genug, Touma-san.
Quizás no sea lo suficientemente 
dulce para ti.
Aunque tal vez no esté 
lo suficientemente dulce.
Ça ne sera peut-être pas 
assez sucré pour Tôma, mais…
Talvez não esteja doce o
suficiente para você, Touma.