Released as an extra thirteenth episode on the sixth Blu-ray and DVD volume, this music OVA picks up after 22/7 is brought back for its fans on December 24, the anniversary of the group's formation. The following day, eight members arrive at the office and find the Wall fully restored, which only makes the mystery around it harder to understand. Hoping to shake off the uneasy mood, Sakura suggests throwing a Christmas party to mark the group being together again. The story puts Mikami Kamiki, Yuuki Toujou and Tsubomi Hiiragi at its center.