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.
He just keeps talking to me!
Er redet nur ständig auf mich ein!
¡Él es el que no deja de acercárseme!
Es él quien no me deja en paz.
C’est lui qui vient me parler !
Ele que vive vindo falar comigo!