I think I haven't watched an anime like this before but it certainly caught my attention, especially seeing that the animation looks really pretty and rosy and the overall theme seems to be nothing alike.
Plus it's a great short option to watch this Christmas. Thanks for the recommendation!
I would say that in a couple of days you could watch all 25 chapters, I know that's not a lot, but if you put your mind to it and have the time you can advance quickly.
It was a pleasure to share this recommendation, I hope it will be useful. Greetings!