this drama caught my eye because of the visual pair and because i myself am really into thriller/action/mystery so this was a easy pick. The cast was amazing. The storyline had a few loopholes and reading the comment sections for some episodes, I could tell people were confused. Many of the comments focused solely on the science and the artificial seminization/cloning however, that's not the important part haha i encourage everyone to focus on the present plot because otherwise you'll get confused yourself and start questioning the logical reasoning of the script/plotline. I'm pretty surprised to say that I did not skim through/skip any scenes of this drama. it was that captivating o.o Besides having almost no romance, I really enjoyed the two MCs relationships. It would have been nice if they had some form of romantic gestures (?) but i guess the main part was the focus on the plot and character growth. The ending....oh boy... all i can say is get ready : ) mentally prepare yourself because I bawled like a baby .