Riku Hayashi, a high school gamer obsessed with Armory: Dead Zone Protocol, finds his mobile game addiction thrust into horrifying reality when a zombie outbreak devastates his campus. Caught in the chaos and knocked unconscious during his desperate escape, he awakens in a gore-soaked classroom to discover an impossible truth: the holographic interface from his game now manifests before him in the waking world. Armed with the ability to level up, accumulate experience points, and unlock an arsenal ranging from firearms to military hardware, Riku must navigate a dead world transformed into his personal survival game. As undead horrors multiply and civilization crumbles, he faces an extraordinary choice: use his system's power to outlast the apocalypse or become humanity's last chance against extinction.