"Fuma no Kojirou: Fuma Hanran-hen" is a continuation of the "Fuma no Kojirou" series, focusing on the conflict between the Fuma and Yagyu clans. The story centers on Kojirou, a young ninja from the Fuma clan, who becomes embroiled in a fierce battle against the Yagyu clan, led by the ruthless Yagyu Jyubei. The Yagyu clan seeks to dominate the ninja world and eliminate the Fuma clan, viewing them as a significant threat to their ambitions.

Kojirou, along with his allies from the Fuma clan, must defend their legacy and prevent the Yagyu from achieving their goal. The narrative unfolds through a series of intense battles, strategic confrontations, and personal struggles. Kojirou's journey is marked by his growth as a warrior and his unwavering determination to protect his clan and uphold their honor. The series delves into themes of loyalty, sacrifice, and the cost of power, as both clans clash in a high-stakes struggle for supremacy.

The main characters include Kojirou, the skilled and honorable protagonist; Jyubei, the cunning and ambitious antagonist; and various supporting characters from both clans who play pivotal roles in the unfolding conflict. The story is driven by the escalating tension between the two factions, culminating in dramatic confrontations that test the limits of their abilities and resolve. The series maintains a focus on the ninja traditions, martial arts, and the moral complexities of warfare, providing a compelling exploration of the ninja world and its inherent conflicts.