April 2025. While helping his childhood friend Naru Arata, Ao Fukai accidentally takes a bracelet being smuggled by Gazelle, Pippo, and Han Juno, and a Scub Coral suddenly appears, along with a G-Monster. Gazelle and his friends were smuggling the item to the Japanese Armed Forces, but they discover the bracelet is missing and go to find Ao to try to retrieve it. In the interrim, another Scub Coral and G-Monster appears, as Cristophe Blanc of Generation Bleu makes a deal with the Union of the Okinawa Islands government to take care of the new G-Monster. Ao soon realizes that the bracelet is one owned by his mother years ago, just as Gazelle goes to take it back.

The G-Monster continues its attack on Iwato Jima, and with Gazelle's help Ao pilots an IFO being transported by the Japanese Navy and uses it to defeat the G-Monster, his hair changing color to turquise in the battle, all while Team Pied Piper pilots watch, realizing that the IFO is the first ever model made.

With renewed resolve to protect Iwato Jima, Ao takes on the G-Monster with some help. And in the aftermath, Ao begins to learn that the world is more complex than he realized. In hopes of finding his mother and learn more about his birth, Ao decides to join Generation Bleu.

Team Pied Piper is dispatched to aid Team Goldilocks, but upon their arrival, they find that their leader sacrificed himself to save his companions. After retrieving the pilots and their IFO, they return to confront the enemy Secret leaving an exausted Ao behind. After awakening, Ao hears from Chloe, one of Goldilocks' pilots about their battle with the Secret and comes with a plan to defeat it. While Ao confronts the Secret, he is watched by an enigmatic figure who takes an interest to him.

After having a brief encounter with the phased-out Eureka, Renton sets with Ao to Iwato-Jima where he thanks Toshio for taking care of his family and then decides to make use of the Quartz Gun to destroy the original Scub Coral at his timeline and prevent it from spreading itself throughout the dimensions. As Ao confronts him to stop it, he learns that surprisingly, Truth has not fully disappeared, but has become the Nirvash Neo's archtype instead. Ao then decides to make use of the Gun's last shot to change Eureka's fate and have her reunited with Renton. Because of it, Ao is transported to the year 2027 where he bids farewell to Truth and returns to Iwato-Jima to resume with his life, despite the fact that there's a chance that no one in the world remembers about him anymore.