On Tatsumiya Island, the tranquil lives of the youth are shattered by the arrival of the Festum, a formidable golden foe. Toh Ubukata, the mastermind behind the anime, brings this gripping tale to life in novel form, delving deeper into the minds of Soshi, Maya, and Shoko. As the island transforms into a military stronghold, the epic battles between the Fafner and Festum unfold with Ubukata's signature flair, marking the dawn of a fresh Fafner saga.