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.
The fair only happens once a year.
Das Fest findet nur einmal im Jahr statt.
Es solo una vez al año.
Es solo una vez al año.
C’est une fête qui n’a lieu 
qu’une fois par an.
O festival só acontece uma vez por ano.