"Ōsama Ranking" centers on Bojji, a young, deaf prince who is often underestimated due to his small stature and perceived weakness. Despite being the firstborn son of King Bosse, Bojji is ridiculed by many in the kingdom, including some of his own family members. His inability to speak or hear leads others to believe he is unfit to inherit the throne. However, Bojji possesses a unique strength: his exceptional agility and resilience, which he hones through rigorous training. His determination to prove himself drives much of the narrative.

Bojji’s journey begins when he befriends Kage, a shadowy, exiled member of the assassin clan. Kage initially plans to exploit Bojji but is moved by the prince’s kindness and unwavering spirit. The two form a deep bond, with Kage becoming Bojji’s loyal companion and protector. Together, they navigate a world filled with political intrigue, betrayal, and supernatural forces. The kingdom’s hierarchy is determined by a ranking system that evaluates rulers based on their strength, wealth, and influence. Bojji’s quest to rise in this ranking becomes a central theme, as he faces numerous challenges that test his courage and resolve.

The story also delves into the complex dynamics of Bojji’s family. His stepmother, Queen Hiling, initially appears cold and dismissive toward him, but her motivations are gradually revealed to be more nuanced. She harbors a deep love for her own son, Daida, who is next in line for the throne, and her actions are driven by a desire to protect her family and the kingdom. Daida, on the other hand, struggles with his own insecurities and the weight of expectations placed upon him as the heir apparent.

King Bosse, Bojji’s father, is a towering figure whose legacy looms large over the narrative. His mysterious past and immense strength are pivotal to the story, as his decisions and actions have far-reaching consequences for the kingdom and its inhabitants. The series explores themes of legacy, identity, and the true meaning of strength, often challenging conventional notions of power and leadership.

As Bojji and Kage embark on their journey, they encounter a diverse cast of characters, each with their own motivations and backstories. These include powerful warriors, cunning adversaries, and enigmatic figures who shape the course of the narrative. The world of "Ōsama Ranking" is richly detailed, blending elements of fantasy, adventure, and drama to create a compelling and multifaceted story. The interplay between personal growth, familial bonds, and the broader political landscape drives the plot forward, making it a deeply engaging tale of perseverance and self-discovery.