Akihiro Kiyose, known by the descriptive nickname "Hoof Technician," works as a physical therapist specializing in lower limb care, particularly feet, at a rehabilitation clinic.

He possesses a background as a competitive long-distance runner who once ran the Hakone Ekiden for Hakone University. His running career ended prematurely due to a career-ending torn Achilles tendon.

Kiyose is drawn into assisting the Kansei University Track Club by its manager, his younger brother Haiji Kiyose. Initially detached and cynical about the team's goal to qualify for Hakone, he views their ambition through the lens of his own past failure and injury.

His primary function is providing essential foot care and physical therapy for the runners. He meticulously assesses their foot health, treats injuries like blisters, offers stretching and strengthening advice, and monitors their condition to prevent and manage injuries, emphasizing critical foot maintenance.

Gradually, Kiyose's involvement deepens beyond technical support. Witnessing the team's dedication and struggles, especially concerning the prodigious but troubled runner Kakeru Kurahara, he offers crucial guidance drawn from his own experience of running's physical and mental toll. He shares his story of injury and unfulfilled potential, revealing deep regret over his lost running dreams. This vulnerability helps Kakeru confront his own fears and motivations. Kiyose evolves from a reluctant technician into a mentor figure, using his experience to aid Kakeru and the team in navigating intense training and competition pressures.

His support proves vital during the team's rigorous preparation for the Hakone Ekiden qualifiers and the race itself. He continues managing their physical well-being while providing steady, experienced counsel. Witnessing the team's journey and eventual participation in Hakone allows Kiyose to partially reconcile with his past and find a measure of peace through their collective effort.