There are many similarities between them and I think if you enjoyed A Korean Odyssey, then you will definitely love Goblin. The two main female characters have an ability that allows them to see spirits/demons and they have an amazing connection with an inmortal being. Also adding to the fact that in the other world they are both extremely important and a rare occurrence. Both main male characters strive to protect her, can be summoned thanks to their connection and are extremely powerful.