Salesman Sekiguchi, who works for a life insurance company, makes a rash decision and switches careers to become a host at a nightclub. At Club One, he finds himself surrounded by an eccentric cast: a "little brother" type host with 20 years of experience, a former idol who specializes in romance-driven sales, a hardcore mobile game addict with a tough-guy attitude, and more. Though Sekiguchi thinks, "This is no job for a sane person." He uses his insurance sales skills to attract customers, plunging headfirst into a wild and outrageous host life.