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.
Yeah. I can finally live with my mom.
Ja. Ich kann endlich bei meiner Mutter leben.
Sí. Por fin puedo vivir con mi madre.
Sí. Por fin podré vivir con ella.
Oui, je vais enfin pouvoir 
habiter avec ma mère.
Sim, finalmente posso 
morar com minha mãe.