Lingling, Yotsuba, and the three older brothers are secretly building the fir tree in the brick warehouse on the Christmas tree. However, when Karen and the others found out what they had been buying ornaments for, they were shocked!! In the end, everyone worked together to prepare for Eve's party. The older brother tells each of the 12 people to give each of them a postcard and give them a present, but the younger sisters… … .