22/7+α

22/7+α is the manga for 22/7. It was written by Reiji Miyajima and drawn by Nao Sakai. It began releasing weekly starting on January 12, 2020 on the Sunday Webry manga website, following a day after the anime releases, and ended on March 29, 2020 with a total of 10 chapters.

The first three chapters and one advertising the release of "22/7+α 1" are free to read online and can be read (in Japanese) here.

Synopsis
The plot of the Manga are original stories not told in the anime. Every chapter focuses on one or two members of 22/7 and showcases a more in-depth story about their idol activities and relationships with one another.