Kasaki fled his home as Misuki's guards closed in, seizing his parents to toil in the tyrant's oil plant. With no choice but to escape, Kasaki ventured into the dreaded Wild Forest, a perilous path all aspiring samurai must brave. There, he will confront all kinds of fantastic beasts and overcome daunting trials to earn his place in the samurai training program.

Meanwhile, Misuki, the ruthless ruler of Black Gold, seeks to cement his power with a dark and deadly spell. Employing the services of the infamous wizard Zizu, he plans to harness the forces of evil itself, invoking Satan to secure his dominion over the land.

As Kasaki trains tirelessly, driven by the hope of one day rescuing his captive parents, he knows time is against them. With each passing day, the threat of their punishment looms larger, spurring him onward in his quest to master both physical and magical arts.

In a world teetering on the brink of chaos, Kasaki must harness his courage and strength to confront evil head-on. With the fate of his loved ones and the kingdom hanging in the balance, he embarks on a journey that will test his resolve and define his destiny.

As Kasaki nears the end of his grueling training, fate introduces him to Kishira, a fierce female ronin driven by a burning desire for vengeance against Misuki, the tyrant who stole her father's life. Despite her independent nature, she sees joining the samurai army as a means to an end, a chance to topple Misuki's oppressive regime.

United by their shared goal, Kasaki and Kishira form an unlikely alliance, their bond forged in the crucible of battle. As Kasaki becomes Kishira's steadfast protector, their connection deepens, intertwining their destinies in ways they never imagined.

But Misuki's grip on power tightens with the aid of Zizu and a dark pact with Satan. His sinister spell ensnares his guards and workers, binding them to his will through a deadly cryptocurrency linked to oil. The spell encompasses a life bar, a complex system tied to a cryptocurrency balance fueled by oil. Every injury, every expenditure of energy, now translates to a depletion of points in this life bar. Should it reach zero, death is inevitable. This way, now every person under the spell is dependent on oil, and, consequently, on Misuki.

As the conflict escalates, Kasaki finds himself torn between personal desires and the greater good of his people. With promises made to Kishira weighing heavily on his heart, he must navigate treacherous waters, balancing love and duty amidst the chaos of war.