Reminds me of Ruyi, a Wattpad novel. They are similar in the sense that they start off with a master and servant (?) type relationship and then they slowly fall for each other.
Lotsa drama. Stabbed, betrayed, kicked, sold, hurt, coma, they have it all. It's a happy ending though, for the most part.
At first I like the king and hated Igen, now it's the complete opposite, I love Igen and dislike the king.
To Take An Enemy's Heart