**UPDATE** - There is no page 20 (it was just a blank page) and this is indeed JOKER chapter 9, it was just labeled as 19 overall in the tankoubon because the tank merges the online and JOKER versions. I v2'd so the title is 9 like it should be.
Here's Christmas release #1~ This chapter is also only part 1 of a two-parter dealing cultural festival shenanigans. I suspect there will be two more releases later today, but perhaps a fourth as well. In any case, enjoy the first part of your Christmas with the links below: