"Umi ga Hashiru Endroll" is a manga series that explores themes of self-discovery, ambition, and the complexities of human relationships within the context of the film industry. The story centers around Haruto Asahina, a young man who dreams of becoming a filmmaker. After the sudden death of his father, a renowned director, Haruto inherits his father's unfinished film project. Determined to complete it, he moves to a coastal town where the film was originally being shot, hoping to uncover the truth behind his father's vision and legacy.

In the town, Haruto encounters a diverse group of individuals, each with their own connection to the film. Among them is Shizuku, a mysterious girl who seems to hold the key to understanding the project's deeper meaning. As Haruto delves into the production, he faces numerous challenges, including creative differences, financial constraints, and the emotional weight of living up to his father's reputation. The narrative intertwines Haruto's personal journey with the collaborative process of filmmaking, highlighting the struggles and triumphs of bringing a creative vision to life.

The characters are intricately developed, with their motivations and backstories gradually revealed. Haruto's determination and vulnerability make him a relatable protagonist, while Shizuku's enigmatic presence adds layers of intrigue. Supporting characters, such as the town's residents and the film crew, contribute to the story's richness, each playing a role in shaping Haruto's path. The manga balances moments of introspection with the dynamic energy of film production, creating a compelling narrative that captures the essence of artistic pursuit and personal growth.