Paradise No. 9: Realm of Illus

The story is set in a future world. After the zombie apocalypse sweeps the world, few human survivors remain. The remnants build virtual amusement parks one after another, each filled with elaborately forged illusion scenes. Before the parks open for business, staff test the parks; the NPCs that look no different from ordinary people are in fact all domesticated and modified zombies. The style is 1950s American atomic-punk retro sci-fi.