One day, Miu Takigawa suddenly receives a letter notifying her that she has been chosen as a member of a brand-new project. Half in disbelief, she heads over to the location stated on the letter. There, she finds seven other girls summoned there in the same fashion. The girls behold a giant, top-secret facility. They stand in bewilderment as they are told: 
 
"You are going to debut for a major record label as an idol group." 
 
A new kind of idol, never-before-seen, is about to be born here… 
 
(Source: Aniplex of America)

Extra thirteenth episode included in the sixth Blu-ray & DVD volume of 22/7. 

22/7 was revived for the fans on December 24th, which was their day of formation.The next day, when eight people came to the office, the Wall was completely revived, and the mystery only deepened. To dispel the disturbing feelings, Sakura proposes to have a Christmas party to celebrate the reunion. 

(Source: Funimation)

Sayuki Takigawa