Dragonaut: The Resonance

Two years ago, Jin Kamishina survives a shuttle accident which killed the rest of his family. Now eighteen years of age, Jin lives a solitary existence, often avoiding questions about the rumors of the shuttle pilot (who was his dad) error. Meanwhile, Earth faces possible destruction from an asteroid, so the ISDA works on the "D-Project". In a facility, Kazuki Tachibana, Jin's old friend, is being tested for his compatibility with a dragon, which is a success. Elsewhere, Jin witnesses a strange creature kill a woman. The creature then goes after him too, and eventually catches up to him, causing Jin to fall out the window. However, Jin is caught by a mysterious girl who is able to fight off the monster. When Jin wakes up, the girl introduces herself as Toa.

Jin suddenly wakes up in an ISDA room, where he is questioned about the shuttle accident two years ago. He is also told the truth about the asteroid Thanatos, in which extraterrestrial life called Dragons came to Earth from Thanatos. Hearing that one of these dragons was the cause of the shuttle accident, he asks them to tell the truth to the public, so his father's name could be cleared. They deny his request and instead ask him to become a Dragonaut, which he rejects. He then meets Kazuki Tachibana, his old friend, who now works for the ISDA. Later, Jin remembers where Toa is to meet him, so he runs away from the ISDA to see her. The two are finally reunited, but it is cut short when the ISDA attempts to capture Toa. During their attempt, one of their own, Spirytus, transforms into a dragon and attacks Jin. In order to protect Jin, Toa reveals that she too can transform into a dragon.

Toa and Spirytus continue their battle as dragons, but once their battle reaches a critical point, the ISDA is given permission to interfere in the battle. Thus, Machina, Amadeus, and Howlingstar transform into dragons, controlled by their "pilots", Akira, Sieglinde, and Raina, respectively. Despite the odds, Toa manages to hold her own, which is when Gio, Kazuki's dragon, arrives on the scene, having previously been awakened by one of Toa's shock waves during the battle. As Gio, who is concerned about Toa, transforms into a dragon, Jin hops on his back so he can try to help Toa. As the two reaches Toa, Jin sees a vision where Toa tells him that she can no longer be with him now that he has seen her real form. Gio then shows up to tell Toa that he was created in order to protect her, and as the two were about to link hands, Howlingstar attacks them, returning them to battle. Then, Toa accidentally knocks Howlingstar onto Gio, plunging Gio and Jin into the ocean.