I always reread this manhwa because of how Dohui's love towards Seong Jae grows and changes. The manhwa started with Dohui's feelings towards Seong Jae. He was using ghosts but eventually later on in the story he had to pay the price for. It's sad what he went through over the centuries, but I would like to think that as karma for him as well. Eventually he gets his happy ending because of his growth.