Working as Chairman Kazutaka Hyodo's able right-hand man at the giant Japanese company, the Teiai Group, Yukio Tonegawa projects an imposing image. However, his leadership of the "Game of Death" project that exploits debtors causes his demotion. Despite facing obstacles from the unpredictable chairman and unfaithful colleagues, Tonegawa establishes Team Tonegawa to confront the challenge. "Mr. Tonegawa – Middle Management Blues" is a spinoff of the well-known manga series "Kaiji," which has sold over 20 million copies and is distinguished by its adaptation of the Ichinichi Gaishutsuroku Hanchou spinoff in certain episodes.