Becoming a Hunter Killer RAW novel

My daughter, who is more precious than anything else in the world, has been kidnapped.
That was the end of my peaceful retirement.
『Become a Former Killer Hunter』 The moment he tracked down the kidnappers and attacked them, darkness suddenly engulfed him.
An unfamiliar voice that penetrates your ears at the same time. [Welcome to the 1st Kerav.] I do not know what you want. But I know what I can do.
A retired killer and a living legend.
His last mission!
In a hell full of monsters and killers, you must retrieve your daughter Eunseo and return home!