I'm neither a BTS fan nor have I any idea of the original storyline... But man that was intense. I can't collect all my toughts because I'm overwhelmed.
The only thing I can say is, this drama stands out. It is not entertainment in the least. It raises too many questions, shows us how shitty the world is we live in, depresses us and if you are sensitive, it overwhelms you.
All the actors did convey the story in an outstanding way and with this material it could not have been easy. Production quality was top notch.
I don't think I need to say more. This was outstanding in so many ways.