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Nobuyoshi Nakai, a rookie loan officer at South Osaka Credit Union, nicknamed "Nanshin," rides his trusty motorcycle through Osaka’s streets, tackling his job with sincerity despite frequent mishaps. Known as “Naka-yan,” he faces daily challenges like a dog tearing his pants during client visits, leading to humorous misunderstandings with coworker Kayo Oba, a clumsy teller. Under the stern but caring branch manager Ando, Nakai works to secure deals, such as convincing a reluctant shop owner for a loan tied to a shopping arcade renovation. He navigates quirky clients like Sakata, a charming but unreliable debtor, and builds connections with locals like Miyuki, who seeks his help for her online picture book business. Nakai’s persistence and creative problem-solving shine as he handles financing issues and builds trust in the community.