"Shin Kyūseishu Densetsu Hokuto no Ken: Raoh-den Junai no Shō" is a two-episode OVA series that serves as a prequel to the original "Fist of the North Star" (Hokuto no Ken) story, focusing on the character Raoh, also known as Ken-Oh. The narrative delves into Raoh's rise to power and his internal struggles as he seeks to conquer a post-apocalyptic world while grappling with his ideals and the legacy of Hokuto Shinken, the martial art he practices.

The story begins with Raoh as a young warrior, training under his master Ryuken alongside his brothers Toki and Kenshiro. Raoh's ambition to become the strongest martial artist and bring order to the chaotic world is evident from the start. However, his methods and vision clash with those of his brothers. While Toki advocates for peace and healing, and Kenshiro seeks to protect the innocent, Raoh believes that only through absolute power and fear can true order be established. This ideological divide sets the stage for the eventual conflict between the brothers.

As Raoh grows stronger, he begins to challenge the existing warlords and tyrants who oppress the weak. His journey is marked by brutal battles and a relentless pursuit of power, but it also reveals his complex character. Despite his ruthless exterior, Raoh is driven by a sense of duty and a desire to create a world where the strong protect the weak, albeit through his own harsh methods. His relationship with a woman named Reina, who becomes a symbol of his humanity and inner conflict, adds depth to his character. Reina's influence momentarily softens Raoh, but his ultimate commitment to his vision of conquest remains unwavering.

The OVA explores key moments in Raoh's life, including his decision to abandon the name "Raoh" and adopt the title "Ken-Oh," the King of Fists. This transformation signifies his complete embrace of his role as a conqueror. The series also highlights his confrontation with his master, Ryuken, and his eventual betrayal of the Hokuto Shinken principles, as he chooses to follow his own path rather than adhere to the traditional teachings.

The narrative culminates in Raoh's ascension to power, establishing his empire and setting the stage for the events of the original "Fist of the North Star" series. His internal struggle between his desire for power and his lingering sense of humanity is a central theme, making him a tragic and compelling figure. The OVA provides a deeper understanding of Raoh's motivations and the circumstances that shaped him into the formidable antagonist he becomes in the main series.