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.
"The rest of you can get started," huh?
„Ihr könnt schon mal 
ohne mich anfangen“, was?
"Los demás pueden ir empezando", ¿eh?
Así que "Podéis empezar sin mí", ¿eh?
« Commencez sans moi »…
"Vocês já podem começar", é?