for the plot. clearly they both fell in love with each other, only now what's left is what will their reaction be if hee-ryang found out yenjo's plan. the plot's getting thicker and hard to tell how the ending would be which makes it more exciting to read.
Every time the ML is obsessed with the MC, he goes and kills the parents.
Did he also kill the kids who were bullying Jueun in high school?