The female lead is terrible - she had 3 expressions throughout - 1. sulk 2. confused 3. blank. She does not have the gravitas to act in this type of role.
When the FL wants to assassinate someone, there is no planning, no nothing. Just rush in hoping that it would work. That's so stupid. She doesn't trust the male lead and chooses to believe everyone else accept the person she can die for. What's that about??

Why, why, why did i waste my time on 23 episodes - i kept watching cos i had hoped the FL would get better. The male lead and the 2nd couple (both male and female) are much better. There was chemistry there.

Almost everyone else is better than the female lead.