A cute, mascot-like angelic cat named Picomaru is sent down to Earth with a divine mission to pass judgment on all of humanity. Innocent and naive, this celestial being expects to encounter kind-hearted people, but for some bizarre reason, every single human he meets quickly reveals themselves to be a vile scumbag. Traumatized by this relentless parade of depravity, the reluctant little angel has no choice but to carry out his holy duty, brutally slaughtering each offender one by one. The series is a dark comedy that contrasts Picomarus adorable appearance with the grotesque and violent nature of his divine executions as he navigates a world where no one is as virtuous as they first appear. The setting is a contemporary Earth that acts as a gallery of human wickedness, forcing the protagonist to continuously face new forms of scumbaggery. The central narrative arc follows Picomarus ongoing, episodic encounters as he learns to cope with the shock of humanitys true nature while fulfilling his brutal role. Key characters include the protagonist Picomaru, whose childlike demeanor clashes violently with his lethal purpose, and a revolving cast of initially pleasant humans who quickly devolve into despicable antagonists. The story is structured around these repeated cycles of deceptive kindness, horrifying revelation, and swift, gory divine retribution.