No. 6

Years after a devastating world war, humanity retreats into six carefully controlled city-states, with No. 6 presented as a calm, orderly utopia. Shion, raised among its privileged elite, has his certainty shaken when he crosses paths with Nezumi, a mysterious boy fleeing capture from beyond the city’s walls. Though Nezumi is a wanted fugitive from the barren wasteland outside, Shion shelters him for a single night—an act of compassion that costs Shion and his mother their elite status and exposes him to the city’s hidden cruelties.

Much later, Shion and Nezumi meet again, their lives now shaped by that first encounter. Together, the former prodigy and the runaway are drawn into a dangerous search for the truth, peeling back the layers of No. 6 and the secrets sustaining its fragile perfection.