At last, Haruki sleeps with Kazusa.  Her wish finally comes true, and she prepares to leave for Europe. Haruki takes Setsuna to the airport, hoping that they can all be together once again.  When the three are reunited, everyone remembers the best moment of their lives: the last song they sang at the school concert.  The title of the song was...
Maybe I should never have met 
you on the roof that evening...
Vielleicht hätte ich dich an diesem 
Abend nie auf dem Dach treffen sollen.
Quizás nunca debimos vernos 
esa tarde en la azotea...
Quizás nunca deberíamos habernos 
visto esa tarde en la azotea...
Ce soir-là, 
sur le toit,
Talvez fosse melhor eu nunca ter te
conhecido no terraço naquela tarde...