The male protagonist and the secondary cast carry the kdrama because the female protagonist is UNSUPPORTABLE. It makes no sense when she becomes cold and skittish with the protagonist's love as she is physically, emotionally and professionally dependent on him. That classic dog man cliché that does everything for the female protagonist and she just ages with indifference. I don't know how there are so many women who like to watch this dynamic, it's a very toxic form of relationship. If it weren't for the boring female protagonist it would have been a better kdrama.