It's been revealed that Quruli will release their new single "Saigo no Merry Christmas" on December 18. 

This will be Quruli's first time releasing a Christmas song as a single. Like their previous single "Remember me" (released in October), the upcoming single will be released as a "15th anniversary box specification" with a limited set of 15,000. It will also come with a CD, including "Kiyoshi Kono Yoru", an original fleece lap blanket, and a Christmas card.