Humans will be human, you either trust them or you don't. This drama was very action packed and entertaining, but I would have preferred a different ending.
Looking back from episode 1 to 16, I really want to pay tribute to Gu Reum, this wonderful woman was a hard worker, diligent, stayed true to herself and a very good fighter, but I honestly think she wasn't really happy. What she didn't realize was that she couldn't change people, people only change if they chose to and on their own terms and free will. The struggle for justice for her parents, leaving her alone from a young age, and the battle to be alone and alone was very difficult for her. I was deeply saddened by the way things turned out for her. Soon, the little happiness she had received was robbed from her.
Ji Oh is the main hero and the result of a genetic experiment. It is a human/animal hybrid which is the first of its kind and was able to escape from the laboratory as a child.
He lived a life where he was lonely, with no memories of his "gift" or "curse" as he calls it, frequently being tracked down by people who don't remember.
The entire series focuses on the humanization of Ji Oh. He encounters the same people again who put him in Hell, which leads him to believe that this is really him.
To free yourself from mental slavery, you must undergo some form of therapy, which unfortunately did not and the result was a reflection of that.
A very disturbing drama, as one might imagine, if something like this was ever possible, there would be crazy dictatorships in power and rich nations would be happy to abuse engineer humans as weapons.
After all, with cloning, growing a human ear on a mouse and even working to grow human organs in pigs, this drama is not entirely fiction.

I think this drama will have a second part!!!