XXXHOLiC #15 has been officially released today in Japan and along with it, the limited edition that comes with the OAD of XXXHOLiC Shunmuki Part 2.
Today the official website of the Tsubasa and XXXHOLiC OADs updated to announce the production of a brand new OAD for XXXHOLiC.
The new installment will be released with the limited edition of XXXHOLiC #16. PRODUCTION I.G and Tsutomu Mizushima (director) will remain in the staff.
The release date is still undecided.
The obi strip that comes with XXXHOLiC #15, apart from announcing the OAD sequel, it reveals that the XXXHOLiC comics have sold so far over 10 million copies.

Double congratulations to XXXHOLiC!
More details about the OAD will be given in due course. Stay tuned!