One day, with Christmas near, a message and a fir tree sent by Itsuka's mother arrive. Remembering back to the broken promises from when she was little, Itsuka is afraid to make another promise with her mother. But Nagomu's words give her a push, and she tells her mother that she'll be waiting.
Yuzu yokan causes Nagomu to remember a conversation he had with his grandfather.
I promise we'll be together 
for your birthday, all right?
أعِدُكِ بأنّنا سنكون معاً في عيد ميلادكِ، اتّفقنا؟
Versprochen, ja? An deinem
Geburtstag bin ich bei dir.
on fêtera ton anniversaire ensemble.
C’est promis !
Ti prometto che per il tuo compleanno sarò con te.
Prometo que vou ficar com
você no seu aniversário, tá?
Мы отпразднуем
твой день рождения, обещаю.