These one are pretty underated Complete Korean Novels :
Master Hunter K., First Hunter, Sovereign of Judgment, A Monster Who Levels Up, Dungeon Hunter (Rushed Ending, but still good).
This story seemed interesting from the description, but after 3 chapters I lost interest. I guess since this story is fictional basic math isn't required. The writer is saying that you can get intimate with a guy and 5 years later you can have a 3 years old baby. ...
Popular Reviews
Master Hunter K., First Hunter, Sovereign of Judgment, A Monster Who Levels Up, Dungeon Hunter (Rushed Ending, but still good).
Valhalla Saga, +Novels by 'Toy Car'
others popular one? it's easy to search those.