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.

After taunting Hajime on GALAX, Katze sets the Neo-Hundred after the Prime Minister. The Gatchaman team are forced to protect him while trying to find a way to stop the Crowds without harming the users.

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.

Utsu-tsu risks her life to heal the wounded, and Hajime's identity is revealed to the world. Rui helps Hajime and Utsu-tsu evade the press, but then demands they give up being Gatchaman, because GALAX makes Gatchaman unnecessary.

Hajime annoys Sugane when she allows the MESS to escape. Later, she teaches Sugane about a popular social app called GALAX, which allows users in the vicinity to help each other, and decides to take him to an offline meet-up.

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.

While Hajime clashes with Sugane and Paiman about why the Gatchaman are so secretive, Rui is faced with a dissenter in one of the "Hundred", who believes that Crowds should be used to kill evil politicians.

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.

Tsubasa has been abruptly thrust into the Gatchaman role, but her positive mindset moves her to embrace her new life and vow to act as a hero. Meanwhile, Rui continues his investigation of the mysterious organization VAPE, but he is suddenly accosted by the red CROWDS...

Due to what happened to Gelsadra, the red speech bubbles suddenly produced mysterious life forms, which start appearing all over Japan and start interacting with everyone. The G members move out to deal with the mysterious beings, but things take a rather unexpected turn...

The general public has come to accept the Kuu-samas into society, and they seem to be helping with Gelsadra's wishes to help everyone become one. However, in order to make everyone become one, the Kuu-samas take the next step. The Gatchaman try to warn the public about the Kuu-samas and their actions, but they find out now that this has been set into motion, it's not easily stopped. The Gatchaman now consider Gelsadra and the Kuu-samas dangerous, which ends up making them unfavorable to the general public that loves both Gelsadra and the Kuu-samas...

The prime minister elections have finally begun. While Sugayama's predicted to win by a landslide, Gelsadra uses his powers to discern what the people want. What he promises his supporters is enough to create a rift even among the Gatchamen.

Rizumu's ideal world slowly starts coming to fruition. The small opportunity presents itself, and is magnified, causing chaos to spread quickly. However, Gelsadra, who is in the middle of all of this, believes he is just doing what the people want and smiles, despite some terrible things that have occurred. Meanwhile, Tsubasa who had separated herself from the Gatchaman and Gelsadra goes back home to Nagaoka to face Yuru-jii and herself...

Japan undergoes rapid change as Gelsadra continues his reforms based on his slogan, "Our Hearts as One, Create Our World, Together." With his popularity on a meteoric rise, his constituents are full of smiles. Tsubasa firmly believes that their shared dream will soon come true, but some cannot help but feel a sense of disquiet over the rapidity of change...