I mean, we didn't need this episode, but I still liked it.
There isn't much of a story here, it's just a bit of time to hang out with these characters. Actually, you will get a bit of development for a few new characters that were introduced this season, and you'll learn a few things about the characters we've known since season one. I really love the way that this anime tells the boys' stories, and this episode also delivered in that area.
The music was entrancing, as always. The art in this anime is not something I was expecting to love so much, but the character designs are really nice to watch. In addition to that, this anime does lighting really well, which is showcased nicely in this episode since it's a Christmas episode. Lighting is something that a lot of anime doesn't really hit the mark on, but this anime really runs away with it and makes it look beautiful.
Overall, this episode was a heartwarming, comforting episode that I think you'll like if you like this series.