I love how the author of this story is doing a brilliant job of making everyone believe that something is going to emerge in this couple as if it were a typical love story, when from chapter one it is made clear who the real protagonists are. But it's the magic of this story, it really is a mind game.
Yes, Abel hates Yeonli (temporarily) but I'm sure it's a big misunderstanding and Abel will stay with Yeonli, Haena is just a secondary character with some momentary prominence, who by the way tried to kill him twice (so who They hate Yeonli, here they have someone else to hate) has betrayed him and in this chapter is manipulating him in an exemplary way.