Hiding Out In An Apocalypse

Three years ago a doomsday prepper named Park Kyu who predicted the worlds end and prepared for it in every way possible As he expected one day a nuclear attack on Seoul led to a global nuclear war resulting in an unprecedented apocalypse
Despite everyones ridicule the protagonist Park Kyu spent his entire fortune over the past three years to quietly dig out his own bunker Was it merely a coincidence that he foresaw all these events