"Dog Signal" is a manga series centered around the lives of individuals and their relationships with dogs, particularly focusing on the challenges and rewards of dog training and rehabilitation. The story primarily revolves around Naoto Furuya, a former delinquent who finds purpose and redemption through his work with dogs. After a life-changing encounter with a stray dog, Naoto becomes deeply invested in understanding canine behavior and dedicates himself to helping troubled dogs and their owners.

The narrative explores various cases involving dogs with behavioral issues, often stemming from misunderstandings or neglect by their owners. Naoto, alongside other key characters such as professional dog trainer Rintarou Takeda and veterinarian Yuki Kojima, works to address these problems by fostering better communication between dogs and their human companions. Each case highlights the emotional and psychological complexities of both the dogs and their owners, emphasizing the importance of patience, empathy, and proper training techniques.

The series delves into themes of responsibility, compassion, and personal growth, as Naoto and his colleagues navigate the challenges of their work. Through their efforts, they not only rehabilitate dogs but also help owners rebuild trust and strengthen their bonds with their pets. The story is structured around episodic arcs, each focusing on a specific dog and its unique struggles, while also weaving in the personal development of the main characters.

"Dog Signal" provides a grounded and heartfelt portrayal of the human-canine relationship, offering insights into the world of dog training and the emotional journeys of those involved. The series balances its educational aspects with emotional storytelling, making it accessible to readers interested in both the practical and emotional dimensions of caring for dogs.