A dead friend calls with impossible choices, and every decision you watch them make feels like it costs something real. The show stumbles hard on the production side, animation cuts corners, pacing lurches, but it doesn't matter because the emotional gut-punch lands anyway. By the ending, you're not thinking about the technical failures. You're thinking about what you would have chosen, and whether your friends would forgive you for it.

Shuuta Aoi, Ran Akagi and Kouki Suidou have been friends since childhood on the 24th Ward, a man-made island in Tokyo Bay. People there call them RGB after their hair colors. The ward relies on the Hazard Cast, a surveillance system that anticipates accidents and sends help, though it cannot say exactly what will happen or stop it. A year after Kouki's sister Asami died in a fire at her high school, Shuuta still blames himself. Ran is chasing fame as a street artist, and Kouki works in the Hazard Cast intervention unit. Brought together at a memorial for the fire's victims, each of them gets a strange call in Asami's voice. The call shows them visions of the future and asks them to pick between two terrible outcomes. They refuse to accept a fixed fate, and that choice begins a string of harsh dilemmas they must face to protect the ward and its residents. The twelve-episode mystery and science fiction series opens with an hour-long first episode.