"Marriage" is a slice-of-life anime series that explores the complexities of relationships, societal expectations, and personal growth through the lens of marriage. The narrative centers on two main characters, Aoi and Haruto, who enter into an arranged marriage due to familial pressures. Aoi, a reserved and pragmatic woman, works as a librarian, while Haruto, a carefree and ambitious photographer, struggles to balance his career aspirations with his new responsibilities as a husband. Their contrasting personalities and differing perspectives on life create tension and misunderstandings, but also opportunities for growth as they navigate their shared life.

The story unfolds over several arcs, each focusing on key moments in their relationship. Early episodes depict the awkwardness and challenges of adjusting to married life, highlighting their struggles to communicate effectively and understand each other's needs. As the series progresses, external factors such as workplace dynamics, financial pressures, and societal judgments further complicate their relationship. Subplots involving secondary characters, including Aoi's overbearing mother and Haruto's competitive colleagues, add depth to the narrative by exploring how external influences impact the couple's bond.

Throughout the series, themes of compromise, trust, and mutual respect are explored as Aoi and Haruto gradually learn to support each other. Key turning points include their decision to confront their families about their expectations, their efforts to balance personal ambitions with marital responsibilities, and their eventual realization that love and partnership require continuous effort and understanding. The series concludes with a hopeful yet realistic portrayal of their relationship, emphasizing that marriage is a journey rather than a destination.

The characters are portrayed with nuance, with Aoi's quiet strength and Haruto's evolving maturity serving as focal points for their development. Supporting characters, such as Aoi's childhood friend and Haruto's mentor, provide additional layers to the story, offering contrasting perspectives on love and commitment. The anime's pacing allows for a thorough exploration of its themes, blending moments of humor, drama, and introspection to create a well-rounded narrative.