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.
Just as the saying states, yuzu takes 
a lot of time and effort to bear fruit.
كما يُقال، يستغرق اليوزو كثيراً
من الوقت والجهد لإنتاج فاكهة
Das heißt einfach,
Comme on le dit, les yuzus requièrent
du temps et de l’effort.
Che gli yuzu richiedono molto tempo e cure.
É como dizem! Yuzu leva um belo
tempo e esforço para dar frutos.