This is mediocre in every way. The animation isn't great. The writing is super basic.
Like most Christmas movies, it's churning out cheap work to make a buck on a guaranteed sale.
But Japan isn't a heavily Christian country, so I'm not sure how guaranteed the sale is.
But for Christmas shows, we end up grading on a curve anyway. So how does it hold up there?
Well, it does manage to squeak a tiny bit of heartwarming out at the end of episode one.
It's a lot more standalone than watching the Christmas episode of any full series.