Half a month after the battle on Treasure Island, Kogane, Kinoa, Shizuru, and Hiiragi ride through the lively streets of Taiwan in a taxi... but Azuma got stuck in immigration and had to catch a later flight. The girls are thrilled by the sights of their first visit to Taiwan, but Hiiragi reminds them that they're there to find the body of the Buranki that went missing when Treasure Island fell. Just then, a headless Buranki shows up at the airport where Azuma is soon due to arrive...

Guy praises Leticia for destroying most of the headless Buranki lurking around Europe. This irritates Kaoruko, who wants Guy to acknowledge her as the number one heart user. Then, when Kaoruko finds out Maxim was given a special mission, Guy tells her that she must first demonstrate her talent as a heart user. Still, Kaoruko boldly laughs, convinced that she will be the one to protect the world with Oubu.

As Azuma and Kaoruko stare each other down, their respective limbs battle it out with their Bubuki. Angus is on the defensive against Kinoa's fierce attacks, Shepherd is overwhelmed by Shizuru, Joan can't get a single attack in against Kogane, and Lakshmi struggles against the cooperative relationship between Hiiragi and Iwatooshi. As the members of the Asian team, who have been under the complete control of their leader Justin, watch the Japanese team fighting without being tied down by their leader, they start to show signs of changing...

The Buranki Entei flies freely through the sky... and the one controlling it is not Reoko, but Kaoruko. Demokratia, led by Guy, has used its technology to make Entei recognize Kaoruko as Reoko. Guy then tells Kaoruko that there is a traitor among them in Demokratia, but she's unable to conceal her shock when told that the traitor is a fellow Bubuki user and ordered to eliminate them.

In a room somewhere deep in Demokratia's island fortress, Kaoruko discovers the identity of the Bubuki users that Guy had called "traitors." She asks Double why she never knows what's going on and why all this happened, but Double only tells her that if she doesn't live up to Guy's expectations and eliminate the approaching Azuma and Oubu, she'll receive the same treatment as the traitors... and that there are some things she doesn't need to know.

Kaoruko has been trying to find a way to see her father again ever since he left her at a boarding school in Taiwan. One day, Guy tells Kaoruko that her father reunited with her mother by going up to Treasure Island in a Buranki that still had its brain. Sensing that Kaoruko, despite her brave act, really wants to see her parents again, Guy makes a proposal that will allow him to use her feelings to serve his purposes...

Peaceful scenery passes by outside the car window, but Azuma has no idea that the kind old man giving him a lift toward the island fortress is Guy himself. Meanwhile, back at their hideout, Kogane and the others are being attacked, and Matobai and Tsuwabuki realize that Azuma is gone. Hiiragi and Kinoa say that until he comes back with Kaoruko, they're on their own, but Matobai's subdued gaze is fixed on the Buranki Batolov.

The Buranki Epimew soars over hills and plains, faster and lighter than the wind, disappearing from sight in an instant only to rise high into the sky again. In the cockpit, Laetitia is delighted by the sight of whooper swans flying by. Since she lives her life in a wheelchair, the world as seen from the birds' point of view is wondrous to her. Epimew flies past the birds and shoots high above the clouds, higher and higher. What's going through Laetitia's mind as she finally reaches the heights of space?

After rescuing Reoko from Guy's island fortress, Azuma and the others rest of the Japanese crew flies back to Japan... but the moment they're over Japanese waters, a flying craft approaches at high speed. From the heart waveform, Matobai determines that it's Mega-lala. Azuma leaps out to the hull of their flying boat to face the Buranki, and a battle between two heart users who could have been great friends if not for the involvement of Bubuki and Buranki begins.

Inheritance: if one were to express it with a different word, it would be "curse." Guy, an inheritor of a heart Bubuki, was released from the curse through the only possible method... only to have it return to him in a sudden turn of events. In anguish, Guy made up his mind to eliminate from this world all the Buranki that had tainted human blood and placed this detestable curse on them, thereby returning the world to untainted human hands. Now, 16 years later, everyone watches the sky as a huge comet approaches Earth...

The massive Deus Magna seems to pierce the heavens as it makes its appearance amidst a raging storm, and inside its cranium is the enemy, Guy. The Buranki Batolov and Mega-lala, along with Zampaza piloted by Kaoruko, wield the Bubuki from Laetitia's fallen Buranki as they charge forward to stop him, each for their own individual reasons. But no matter how fiercely they attack Deus Magna, they can't even leave a mark. Meanwhile, inside Deus Magna's body, Azuma and his team enter the battle with Oubu to try to stop Guy and save Reoko.

It's been a year. Peace has returned, and everyone is back to living their old lives again. Azuma has started living on his own and now attends the same high school as Kogane. All Buranki controlled by Guy's Demokratia have been handed over to government-managed companies. As he watches the news over breakfast and opens a letter from Epizo, Azuma can't help but feel how much quieter his life is now.