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.
And for sanitary purposes, you have
 to take care of your nails,
،وبهدف النّظافة، عليك العناية بأظافرك
Und für die Hygiene mussen
die Nägel immer perfekt sein,
Y por razones sanitarias,
hay que cuidar las uñas,
Y por razones sanitarias,
hay que cuidar las uñas,
et vu qu’on doit se couper les ongles
pour l’hygiène,
e bisogna avere cura delle unghie 
per motivi di igiene,
E por razões sanitárias, tem que
sempre cuidar das suas unhas.
и они тщательно следят
за чистотой ногтей.