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.
A guy, sure, but I'm not 
interested in a taken guy
Ich hab kein Interesse 
an einem vergebenen Kerl,
Con un chico, claro, pero 
no uno que tiene novia
Con un chico, claro, pero 
no con uno que tiene novia
Un garçon qui ramène sa copine
 dans ses valises ne m’intéresse pas.
Sim, é um cara, mas não tenho
interesse nenhum num comprometido