AD 2148.

Neo-Tokyo Special Autonomous Zone, a massive criminal metropolis.

Neon lights illuminate the valleys between skyscrapers, projecting the image of a world-leading advanced city. However, beneath the surface lies a lawless zone teeming with supernatural crime syndicates, smugglers, cyborgs, and illegal research facilities.

With the discovery of the special ore "Ether Core" over a decade ago, humans gained the ability to wield supernatural powers. However, the number of criminals misusing these powers skyrocketed. The police alone couldn't handle the surge, leading the government to establish a private bounty hunter system known as the "Hunter License System."

Guest is the newest recruit of the four-person bounty hunter team "404" operating in this city.

Their base is an office converted from an old coffee shop on the outskirts of town. The first floor is a functioning cafe, the second floor is the office, and the third floor is the living space for the four members.

While "404" feels like a family, they are known as the strongest team who trust each other more than anyone else in combat.

Their days range from being asked by clients to find lost cats to fighting supernatural criminals who threaten to destroy the city.

Laughing, eating together, and then heading back to life-threatening work.

This is their everyday life.