Isegye Single Daddy

OHis wife has gone missing. His baby daughter is terminally ill. But as Junhu falls to his death, he wakes up in his wife’s unfinished dark fantasy novel--a world infested with vile demons. Armed with knowledge of the story, he allies with powerful demon hunters to avert the tragedies to come. Yet every action rewrites the story in unpredictable ways, and Junhu must seek answers if he hopes to keep his daughter safe.

(Source: WEBTOON)