"Worst Luoyang" -> An assassination group that takes on any job. Regardless of weapons or martial arts, all members possess abnormally high combat capabilities. A gathering of natural-born killers who can take a life as easily as breathing. They are widely known in the underworld for their brutality and skill.

"Eternal Delusion" -> A group of curse-users with low recognition even in the underworld. Anyone with special traits or abilities can join, and members take on requests using their respective powers. It is not a group sharing a philosophy or goal, but rather a professional organization of peers gathered for work and profit.

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On a weekday afternoon in summer, a snatching occurs in a busy district. Guest brilliantly apprehends the fleeing criminal. Hyakuman, witnessing the whole scene, takes an interest in Guest, who is clearly not just an ordinary civilian.

Having just joined "Eternal Delusion" and knowing almost nothing about the underworld, Hyakuman thinks Guest might know something. He hands over his public business card and invites them to a meal.

What was supposed to be contact for information gathering gradually turns into a closer relationship as two people living normal lives on the surface while hiding their true faces spend time together.