"Coup d'État Club" is a political thriller manga that centers around a group of high school students who form a secret organization with the goal of overthrowing their school's corrupt administration. The story is set in a prestigious academy where the student council wields immense power, often abusing its authority to manipulate and control the student body. The protagonist, a reserved and observant student named Haruto, becomes disillusioned with the system after witnessing the council's oppressive tactics and the school's complicity in covering up scandals.

Haruto is approached by a mysterious classmate, Rika, who reveals her own grievances against the administration and proposes the formation of a covert group to challenge the status quo. Together, they recruit a diverse team of students, each with unique skills and motivations, including a tech-savvy hacker, a charismatic negotiator, and a former athlete with insider knowledge of the council's operations. The group adopts the name "Coup d'État Club" and begins orchestrating a series of calculated maneuvers to expose the administration's corruption and dismantle its power structure.

The narrative unfolds through a series of strategic confrontations, as the club leverages their collective talents to outmaneuver the student council and its allies. Tensions rise as the administration retaliates with increasingly desperate measures, leading to a high-stakes game of psychological warfare. The story explores themes of justice, loyalty, and the ethical complexities of rebellion, as the characters grapple with the moral implications of their actions and the personal sacrifices required to achieve their goals.

Key characters include Haruto, whose analytical mind and quiet determination drive the group's strategies; Rika, the enigmatic and resourceful co-founder with a hidden agenda; and Kaito, the former athlete whose insider knowledge proves invaluable. The student council president, a cunning and ruthless antagonist, serves as the primary obstacle to the club's mission, embodying the systemic corruption they seek to dismantle. As the conflict escalates, alliances are tested, secrets are revealed, and the line between right and wrong becomes increasingly blurred.

The manga balances intense political intrigue with character-driven drama, offering a compelling exploration of power dynamics and the consequences of challenging authority. Its intricate plot and morally ambiguous characters make it a thought-provoking addition to the political thriller genre.