Omniscient Reader: The Prophet

Dok Ja was an average office worker whose sole interest was reading his favorite web novel, "Three Ways to Survive the Apocalypse". But when the novel suddenly becomes a reality, he is the only person who knows how the world will end. Armed with this realization, Dok Ja uses his understanding to change the course of the story and the world as he knows it.
(Source: webtoons.com)
~~ Adapted from the web novel "Omniscient Reader's Viewpoint" (전지적 독자 시점) by Sing N Song (싱숑).