The plot in itself pretty unusual. A robot whose artificial intelligence learns to process his conglomerated thoughts into deciding facts instead of going as per the designed program algorithm.
Since Goblin ended, I was waiting to see another Korean drama that is visually stunning and has a great vfx.
Seo Kang Joon is beautiful to look at at any given time, but the way he keeps staring deadpan at everything sometimes actually makes you feel like he is not a human but rather a robot. There is just no expression in his eyes as a robot. He portrays the double role of the human and the replicated look alike robot in such a stunning manner that you feel both the roles are being played by two different entities.
Gong Seung Yeon compliments her role as the bodyguard in equally beautiful way. Her expressive face and confused yet determined persona balances the equation to move the story forward in a very easthetic way. Lee Joon Hyuk is a surprisingly brilliant addition that binds the entire story in a very smooth manner. He is a man of really in depth method acting. His lines are more effective simply because he says it all through his eyes and facial expressions.
Since Goblin and Circle , this drama sure made it into my all time favorite list.