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.
You didn't leave it out 
with water on it, did you?
لم تتركها في الخارج وبداخلها ماء، صحيح؟
Du wirst es doch nicht wieder
No lo habrás dejado húmedo
 y a la intemperie, ¿o sí?
No se habrá mojado mucho
y lo habrás dejado fuera, ¿no?
Dis-moi, tu l’aurais pas laissée tremper
dans la flotte ?
Non l'hai lasciata in giro bagnata, vero?
Você não deixou com água
dentro antes de usar, deixou?
Ты же её насухо вытирал, да?