This is a great story of how family and traditions can clash, especially around major holidays like Christmas. Thankfully, in the story, the tradition changes and this brings about a transformation in the family dynamics. The translation in English is excellent. One recommendation that I would make is to use more dialogue to get a sense of these interesting characters, and how they converse with each other. Your descriptions of the Christmas atmosphere are superb as shown in the following quote:

The tree sparkled among the colored lights, laden with gold, green, blue, and silver ornaments that shone with melancholy, while the music box played non-stop with Christmas carol melodies. The adjacent table was dressed with a thick woven tablecloth, on which the cheerful faces of elves with pointed ears wearing red and green hats in alternating order combined perfectly.

This creates a cheerful and melancholic atmosphere that is perfect for Christmas.