At ayu.no it says that:
"According to Peco's blog, ayu has filmed a new CM on december 9th. What it is for is yet unknown. She also reveals that the preparations for this years countdown live is well on it's way and the ola jeans which ayu uses during the encore are done (she is the one who makes and designs it). Filming and editing of the GUILTY PVs have also completed. If Yo-Chan is actually in the video, or if he just visited the set is not answered, but something points to him having a role."
Maxker is always so fast with interesting news
