Hajime Ichinose is a rather eccentric schoolgirl who is obsessed with notebooks. One day, she is approached by a mysterious man named J.J. who pulls out a journal called a NOTE from her body, declaring her to be the new member of the elusive Gatchaman team.

The mysterious "Crowds" are revealed to be strange beings controlled by the GALAX users. Meanwhile, Joe fights against the strange alien known as Berg Katze, but is beaten back when Katze uses a NOTE of their own.

Katze takes on Rui's form to steal control of GALAX and form a new "Hundred". Hajime suggests the best way to fight is for the Gatchaman team and Rui to reveal themselves and go public. Rui learns a troubling fact about the side effects of Crowds.

Misudachi Tsubasa is an ordinary high school student in Nagaoka City. But everything changes when an alien spaceship lands crashes down right next to her house and the Tachikawa Gatchaman crew come to investigate...

Tsubasa arrives in Tokyo with Gelsadra, where they are promptly enlisted to appear as guests in the popular Millione Show. There, they make a favorable impression, and they're soon familiarization themselves with their new teammates in the Gatchaman HQ, Tachikawa CAGE. However, Suzuki Rizumu, the VAPE leader, is about to make his move...

With the support of a majority of voters in the smartphone election, Gelsadra becomes the prime minister. He quickly absorbs knowledge and gains an understanding of politics in Japan.

Having accepted the masses' wishes, the Gatchamen head to battle with a strong resolve to put everything they have on the line in order to grant them.