Both feature smart and badass FL who is a undercover cop, morally grey ML.
The way both leads manipulate each other and fall in love for each other is similar too.
Similar plot twists regarding the leads.
LW has a bit more plot on other uc cops tho.

Both shed a light on morality and human nature.
There is a lot of lying involved and the more you uncover the more uneasy you feel.
They both made me think a lot after finishing the drama.

They are similar as the main character are quite similar. Both are incredibly smart students that want to achieve good grades, and are usually bullied.
Both get involved in a series of unfortunate events once they meet the other main cast that lead them to commit more and more inmoral choices.
We see the main lead going from a normal person, to losing themselves in the process of covering up a lie with another lie and more mistakes.
Both are on the road of becoming a "bad person".

Both are mind blowing and deal with really heavy topics.