Who is Chul-hwan?

Young-hwa is confused as Chul-hwan tells her that the curse started because of her. She tells Jun-o about Chul-hwan, but Jun-o also doesn’t have a clue. In her dream, Young-hwa finally finds out how Do-ha died, and why she had to kill him. Meanwhile, Chul-hwan meets Yi-seul who has been kicked out of her agency.