This is a bit of a repetitive skit where Mizuki, Minami, Hideyoshi and Akihisa answer what Christmas means to them, all effectively give the same answer and take the same actions. The difference between the characters is the reactions of the class F cult to the specific person. The animation isn't as good and part doesn't really make sense in the context of the anime. The characters are the same as in the main anime. Overall it's not the best skit but your opinion may differ and it's only four minutes so might as well give it a shot if you're here anyway. Just don't expecttoo much.