I started this drama with no expectations Because I do not usually watch K dramas But when I completed first episode, I know that I've found the gem ?? ...
This is one of those dramas where you can't predict what happens next which is both frustrating and exciting at the same time. Flower of Evil gets better and better with each episode. Never once was I bored while watching this, every moment was thrilling. It exceeded my expectations and I loved every second of it!
I really love the way that ML did not even realise how hard he fell for our FL ...
The two main leads are phenomenal. Lee Joongi's acting is incredible, Moon Chaewon too, she performed her character very well and at times I could almost feel what she was feeling, it was that good. This is one of my all time favourite pairings in a drama, their chemistry and development is amazing!!
Osts are at point , whenever it starts i could not stop crying ...

IN SHORT:
It's an amazing humane drama with an incredibly beautiful narrative. The dialogues are so well versed they hit right into the heart! The quiet heartwarming background piano (sometimes violin mixed too) makes the past flashbacks scenes very alluring and majestic. Those first scenes (the flashbacks) are one of my top favorite bits of each episode!