Episode 8 of "Ranking of Kings: The Treasure Chest of Courage" consists of two main sections: one focuses on Kage and Sir Kyo, while the other sheds light on the early years of King Bosse and Queen Shiina.

The episode begins with Kage, a member of the Shadow Clan, a lineage of assassins notorious for their deadly members. This part introduces Sir Kyo, the highest-ranking knight of the Kingdom of Bo, who is admired by all the children of the realm. Sir Kyo's appearance, particularly his stern gaze, might give the impression of a harsh personality. Contrary to the common stereotype, however, Sir Kyo cares for the citizens of the kingdom, including Kage.

When Kage finds himself in danger, Sir Kyo intervenes and saves him. This action inspires Kage to strive to help more people, motivated by Sir Kyo's selfless deeds and his advice about a knight's duty to protect the citizens. When Kage asks about his identity, Sir Kyo emphasizes that his name is of no importance, reflecting his humble, dutiful attitude.

The narrative then shifts to the second part of the episode, which centers on the previously recounted encounter between Bosse and Shiina. Despite revisiting this subplot, the episode offers few new details. Viewers were already aware of Shiina's nurturing nature and Bosse's care for Bojji, which are once again highlighted in this segment.

A new element is the episode's art style, which takes a distinctive approach that may not appeal to all viewers. In this story, Queen Shiina stops a girl from stealing a baguette. The girl explains that her father's injury prevents him from working, prompting Shiina to immediately offer her a job. While one might expect this girl to become Bojji's caretaker, she ultimately serves as a maid.

This part of the episode also clarifies that Bojji was born before the construction of the Kingdom of Bosse's castle, suggesting that Bojji's age matches the nation's. Additionally, it explains why Bosse, despite his potential, never claimed the number one spot on the Ranking of Kings.

Originally known for his obsession with becoming the strongest man in the world, Bosse loses interest in the top position after Bojji's birth. His paternal love outweighs his desire to be the strongest, to the point where he refuses to compete for the top rank. This aspect of Bosse's personality had not been explored until now.