22/7 make a comeback in front of their fans on 12/24, which is the anniversary of when they formed the group. The next day the eight members gather at the agency, where they discover that the Wall has been completely restored to its original state. As the mystery deepens, Sakura proposes a Christmas party to celebrate the reunion of the group and to clear out any bad vibes. Suddenly three strangers enter the room. They are wearing the same uniform as the eight members, and they introduce themselves as Mikami Kamiki, Yuki Tojo, and Tsubomi Hiiragi. They claim that they are new members gathered by the Wall.

[Source: official English website]