Summary
In a world shrouded in gloom, humanity huddles within a single sprawling metropolis, its last bastion of light and color against monstrous threats. As brave missions push to reclaim the lost lands, a youth named Kay yearns to be part of the fight. He is met with derision and exclusion for his condition—being “colorless,” a person without any pigment. His destiny shifts abruptly when a devastating incident unexpectedly awakens within him the formidable power of the color black.