Haruki hears about Kazusa's moving from her mother, who she hadn't been on good terms with.  He feels betrayed and angrily confronts her.  But his words force open the door to Kazusa's heart, which she had desperately tried to keep closed so that the three of them could stay together.
Even if I can't make it before 
it's over, I'll at least stop in.
Auch wenn sie bereits vorüber ist, 
werde ich vorbeischauen.
Aunque se acabe antes de que llegue, 
al menos pasaré a saludar.
A lo mejor llego cuando ya habéis 
terminado, pero me pasaré a saludar.
Je passerai te voir, 
même si la fête est finie…
Mesmo que eu não consiga
 chegar antes do fim,