Goumon Baito kun no Nichijou unfolds in a world where killing and torture have been legalized, turning brutality into an ordinary part of working life. Sero, a part-time employee at a torture company, spends his days on the job beside his senior colleague Siu, and the series finds its darkly comic tone in the contrast between the grotesque nature of their work and the unexpectedly relaxed, almost home-like atmosphere of the office around it.
When the new part-timers Mike and Hugh join the company, the workplace grows even livelier, adding new personalities to an already bizarre routine. Their presence gives Sero and Siu more chances for banter, awkward camaraderie, and deadpan reactions to a job that should be horrifying but is treated like an everyday shift. As the four settle into their roles, Goumon Baito kun no Nichijou follows the small details of office life, the absurd rhythms of labor, and the cheerful normalcy that can exist even in a place built around cruelty. That tension between routine and revulsion is what drives the series’ comedy, making its strange "fun torture life" feel like the most normal thing in the world.