A virus that appeared out of nowhere one day has spread across the entire globe. The world instantly transformed into an apocalypse. This airborne virus causes those infected to gradually develop shark-like heads, turning them into madness-driven monsters craving blood and flesh. Researchers call this the 'Shark Virus.' And here, in this world, is a man who possesses the only natural immunity and vaccine within his body—that man is me. Meanwhile, in an abandoned building, a survivor with blue hair and blue eyes is trembling, barely able to breathe.

Graaaargh!

Beyond the second-floor window of the abandoned building, two or three infected wandering the hallway snapped their heads around as if sensing Saerom's trembling voice. Their jaws, which had grown jagged like shark teeth, hung open, and rotten saliva dripped onto the concrete floor. They began to approach slowly but surely, leaning against the walls with forearms where rebar-like muscle was exposed.