Thirty years ago, the world was plunged into chaos when Fallen Gods and their Fallen Towers suddenly appeared across the lands. From these towers poured forth monsters, and peace was torn away from humanity.
But the eight million gods granted sacred weapons—Divine Arms—to chosen humans of great strength. These heroes conquered the Fallen Towers, purified the Fallen Gods, and restored balance to the world. Among them stood the mightiest of all—the Three Paragons. One of them, Shotaro Kusunoki, wielder of the Blade of Purity, was hailed as the strongest hero of his age.

His younger brother, Hiromu Kusunoki, could only watch in awe, serving as a humble porter just to witness his brother’s glorious battles up close.

However, tragedy struck when the Fallen God Futsunushi possessed Shotaro’s body. As Hiromu faced death at his brother’s hand, he suddenly heard a mysterious voice echo from the Blade of Purity—the voice of the wild god GAYAMARU, who dwelled within the sword.

To save his brother, the boy forges a bond with the god of fury—
and together, they ascend toward ultimate strength!