In the bustling city of Mitsuba, three unlikely individuals find themselves thrust into civil service roles. Lucy Yamagami, a determined young woman in the Welfare Administrative Section, seeks vengeance against a fellow civil servant. Yutaka Hasebe, a charming man in the Welfare Department's First Section, aims to coast through work and enjoy life. Meanwhile, Saya Miyoshi, a fresh college grad in the Second Section, strives to navigate her first job with diligence. Their supervisor, the clueless Taishi Ichimiya, guides them through the complexities of government work despite his own inexperience. As they tackle office dynamics, paperwork, and citizen complaints, these new civil servants learn the ropes and discover the challenges and rewards of public service in Servant x Service.