When you said the words "girls in santa outfit" and "illustrations", I immediately thought of the NSFW versions. I don't know why?
Patience, my brethren. Hold your thoughts, don't let this thread fall down to the depths of dark, muddy theories again. Lewd speculations are welcomed tho.
Implying the lack of chapters which consists of Nanami. You can scroll back to the older pages of this thread to see them.