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...
I didn't want you to leave me behind.
Ich wollte nicht, dass du mich zurücklässt.
No quería que me dejaran atrás.
No quería que me dejarais atrás.
Je ne voulais pas 
être mise à l’écart.
Não queria que vocês me
 deixassem de lado.