"Boku, Otaryman" is a manga series that blends comedy, slice-of-life, and workplace themes, centering on the life of a salaryman who unexpectedly becomes a father. The protagonist, a middle-aged office worker, leads a mundane and uneventful life, defined by his routine job and lack of personal fulfillment. His world is turned upside down when he discovers he has a young daughter, the result of a past relationship. Despite his initial shock and reluctance, he decides to take responsibility and raise her, marking the beginning of a transformative journey.

The narrative explores the challenges of balancing work and parenthood, as the protagonist navigates the demands of his corporate job while learning to care for his daughter. His inexperience as a parent leads to humorous and heartfelt situations, as he stumbles through the complexities of childcare, school meetings, and parenting advice. The daughter, a cheerful and curious child, often provides a stark contrast to her father’s reserved and awkward demeanor, creating a dynamic that drives much of the story’s emotional and comedic moments.

Supporting characters include coworkers who offer varying degrees of advice and camaraderie, as well as other parents who provide insight into the struggles and joys of raising children. The series delves into themes of personal growth, responsibility, and the unexpected ways life can change. Through its episodic structure, "Boku, Otaryman" captures the everyday triumphs and tribulations of its protagonist, blending humor with moments of genuine warmth and reflection. The story’s focus on the evolving relationship between father and daughter forms the emotional core, offering a relatable and engaging portrayal of modern parenthood.