"Ojō-sama Yomeiri Kōsō" centers on the life of Kiyoka Kudou, a high-ranking nobleman known for his cold demeanor and high standards, and Miyo Saimori, a young woman from a disgraced family branch. Miyo, having endured years of neglect and mistreatment from her relatives, is arranged to marry Kiyoka as part of a political alliance. The story explores their evolving relationship as they navigate societal expectations, personal insecurities, and the complexities of their respective pasts.

Miyo, raised without the privileges of her noble status, struggles with feelings of inadequacy and self-doubt, believing herself unworthy of Kiyoka’s attention. Kiyoka, initially distant and critical, gradually begins to see Miyo’s resilience and kindness, leading to a shift in his attitude. Their interactions are marked by moments of tension, misunderstanding, and eventual mutual respect, as they both confront their own vulnerabilities and the pressures of their social positions.

The narrative delves into themes of class disparity, familial duty, and personal growth. Miyo’s journey is one of self-discovery, as she learns to value herself beyond the constraints of her upbringing. Kiyoka, meanwhile, grapples with his own preconceptions and the weight of his responsibilities, finding unexpected solace in Miyo’s presence. Supporting characters, including members of their households and rival suitors, add layers of conflict and intrigue, further complicating their path to understanding one another.

The story balances emotional depth with moments of lightheartedness, creating a nuanced portrayal of a relationship forged under challenging circumstances. Through its exploration of societal norms and individual agency, "Ojō-sama Yomeiri Kōsō" presents a compelling tale of love, resilience, and the transformative power of mutual respect.