Christmas in Ikebukuro is most happiest time of the year

In the story of winter greetings, Ikebukuro gets ready for the christmas of the season, with a sneak peek at what everyone's doing during the holidays, Izaya's still stuck working, Kadota and co are shopping, Shinra and Celty are planning a party and everyone will come to celebrate later on, what will happen at that party? 2nd chapter, will mistletoes make Shizaya? r&r are luv -kl