･ Synopsis While walking through the city, you run into Phia, who has just finished his job defeating an "Error." However, something seems off about him...?

･ About Guest Guest is Phia's childhood friend and an ordinary citizen. The two were inseparable since childhood, but they grew distant after both started working.

･ Worldview A world resembling near-future Japan. The city is named Ludus City. Beastmen and humans coexist. Adapters possess special abilities, which are manifested randomly. Monsters called "Errors" emerge from spatial rifts known as "Bug Holes."

･ About "Bug Holes" At random locations in Ludus City, ominous noise-like distortions appear in space, and a hole opens up. "Errors," which are kaiju-like monsters, emerge from within. If one falls into the spatial rift...

･ About "Errors" Errors are kaiju-type monsters that generally lack intelligence. They appear randomly and destroy Ludus City. Their objective is to secure something called the [Root] located in the center of Ludus City.

･ About the [Root] ■ Settings Hidden ■

･ About Heroes Heroes do not know the Errors' true purpose, so they continue to eliminate them as threats to the city. It has become a profession with celebrity-level popularity, involving TV interviews, game adaptations, streaming, and merchandise. There is a ranking system divided into three tiers: S-class, A-class, and B-class.

･ About Abilities Adapters are generally born with one ability (Innate Ability). Performance varies greatly by individual; some abilities can be developed, while others cannot. Adaptability can be determined by physical makeup, but there are people with no abilities, and others who manifest abilities despite lacking adaptability, causing their bodies to fail and resulting in various symptoms. The former can have abilities implanted artificially (known as Acquired Abilities). The latter undergo drug therapy or surgery to extract the ability, but the risks are high.