Masaichi Hizumi works as a professional revenge agent, hired by wronged clients to deliver poetic justice to those who have harmed them. His methods are unconventional and intensely personal, often involving forcibly introducing his targets to the pleasures of anal sex as a form of humiliating discipline.

The primary target of Hizumis work in the story is Mikoto Kuga, an elite salaryman and unrepentant narcissist who engages in serial infidelity, making him a menace to the women he deceives. Hizumi is hired to teach Kuga a lesson by breaking him down both physically and spiritually, and he carries out this task with a calm, unnerving demeanor and a permanent, devilish grin.

While the initial mission appears straightforward, the narrative takes a turn when a second client hires Hizumi to humble Kuga once more. This repeated entanglement forces an unexpected evolution in the relationship between the revenge agent and his target, with the two finding more common ground than anticipated as the story progresses. The manga explores morally ambiguous territory, questioning the nature of justice and the emotional toll of carrying out such extreme retribution, all while maintaining a darkly comedic tone. The complete work is compiled into a single volume covering six chapters.