"Shiawase ni Narenai Kekkon Sōdanjo" centers on a marriage consultation office that specializes in helping individuals who struggle to find happiness in their marriages. The protagonist, a young woman named Aoi, works as a consultant at this office, offering guidance to clients facing marital difficulties. Aoi’s role involves listening to their problems, analyzing the root causes of their unhappiness, and providing tailored advice to help them navigate their relationships. The narrative explores various cases, each presenting unique challenges, such as communication breakdowns, infidelity, financial stress, and differing life goals.

Aoi’s own past plays a significant role in her approach to her work. Having experienced personal hardships in her own relationships, she brings empathy and insight to her consultations. Her interactions with clients reveal her deep understanding of human emotions and her commitment to helping others achieve fulfillment. The series delves into the complexities of marriage, portraying both the struggles and the potential for growth within these relationships.

The supporting characters include Aoi’s colleagues at the consultation office, each contributing their expertise and perspectives to the cases. The clients themselves are diverse, representing a wide range of ages, backgrounds, and marital situations. Through their stories, the series examines themes of trust, compromise, and the evolving nature of love. The narrative balances emotional depth with practical solutions, offering a nuanced portrayal of the challenges faced by couples.

The plot progresses through episodic arcs, with each case serving as a self-contained story while contributing to the overarching exploration of marriage and relationships. Aoi’s personal journey is interwoven with her professional life, as she reflects on her own experiences and growth. The series maintains a focus on realistic portrayals of marital issues, avoiding overly dramatic or sensationalized depictions. Instead, it emphasizes the importance of communication, understanding, and mutual effort in sustaining a healthy relationship.