Compelling, fascinating and brilliant from start to finish. Really rare for you to find dramas which has like twists in each episode. I ended each part with 'NOOOOOOOOOOOOOO' so many times lol.

I love the fact that the writers are very creative in coming up with this complex story that made you question about everything only to be proven wrong episodes later. The writers also love to tease/mislead the audiences with the way they structure the plots.

Even the final scene is brilliant as well. The solved everything at the end but to excite the audiences with the sci-fiction theme that they're going for, they put that little bit mystery at the end. It opens for future possibilities and made people speculate about what could happened after that.

Great movies / dramas always made people talk and speculate about the ending and this drama is exactly like that as well. Some people might dislike it (which I totally understand) but this is one aspect of creative writing and with the way everything is structured since in the beginning of the drama, we should expect the non-typical finish that the writers might give us at the end. They certainly didnt disappoint.

Simply the most compelling Kdramas I have ever watch and no doubt in my book as one of the greatest Kdramas ever made.