Thirty years have passed since the world was connected to a world known as the Frontier. Countries around the world began exploring the Frontier in search of new resources.Currently, if they have the qualifications, even civilians can pass through the gate and go to the Frontier. And so, a new profession was born: adventurers, who bring back resources and sell them.Okita is suddenly fired from his company. With barely any savings, he becomes an adventurer to make a living. On his first adventure, Okita acquires the skill of alchemy.From that moment on, Okita Hajime's life begins to shine with gold. At the same time, the Golden Witch, who would shatter the common sense of the world, was born.