In both drama the ml is a hired hitman who gets entangled with the fl in the middle of their chaotic lifes.

"mama i'm in love with a criminal"
In both drama both the main leads is technically a criminal who get together under some very peculiar circumstances.

Both drama revovle around the topic of teenage pregnancy, the difficulties, stigma, prejudices and struggles people in that situation have to face in both society and in their social circle.

They are many similarities between the two drama especially due to its theme and its execution. They both focus on revenge and on what exactly is justice and retribution. Also the ambience and the ending are similar.

In both drama the main characters share the same profession. Moreover in both drama the themes of life and death are prevalent.

In both drama you see the characters' growth through a very realistic perspective. You may not agree or be satisfied with how things are handled especially towards the endings but you have to admire the realism.

I find them similar mostly over how natural the romance and the relationships were acted out and presented.

First things first the characters arent exactly likeable. You might experience the same kind of irritation. Mind your blood pressure while watching.

Both drama have:
A director type ml that deals with trauma and psychological issues that are tied to his childhood, a doctor fl who helps him throughout, bickering, emotional scenes, company conspiracies and power struggles.

In both drama the mls decide to "infiltrate" in another house in order to achieve certain goals but they find themselves falling for their roommates.

Both drama have the same feeling to them, hardworking ml and a sheltered princess fl who come closer despite their differences.

Both drama have : A teacher/mentor figure who do their best to help out each of their students ans students who face various problems in their lives. Towards the ending there are also a couple more similarities which wont be mentioned for the sake of not spoiling the drama to people who wish to watch either of them.