The live-action adaptation of Sweet Home isn’t a perfect adaptation. However, this was done on purpose for a couple of reasons. The biggest reason is that the original authors said that they didn’t want the TV series to perfectly follow his work.
One author, Kim, did admit that he was a little worried. He didn’t necessarily doubt the director, Lee Eung-bok (Mr. Sunshine), but the ability of Korea to handle the unique genre. According to Kim, this was the first monster genre drama to be made in Korea, and he wasn’t sure if the director could grasp it.