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.

After the success of the School Fair concert, Haruki and Ogiso fall in love. But the two of them still want to include Kazusa just like they have so far. Kazusa answers by affirming her friendship with Setsuna, and on the surface things continue as before. And before much time has passed at all, the second semester is over and winter break begins. Setsuna and Kazusa drag Haruki on a Christmas hot springs vacation, and they enjoy their last big, fun, event.