This drama is a fresher take on mystery genre, since I've never seen any drama that dealt with a company that deleted your life upon your death. It kept you on your toes to figure everything out and it filled you with delight and satisfaction when you got it right. And the story was touching and unexpected, you watched it unravel before your eyes and you'll be humbled by the humanity of humans shown in each episodes.

The acting is top-notch and I couldn't think of anyone better to cast as the two main leads, their friendship grew so naturally and their dynamic is one of the most important aspect of this drama.

I find it difficult not to give this drama a solid ten. I'm sold as hell even from the first episode and even the next episodes flew by me so quickly that I didn't even notice I've reached the last episode.

And I still want Season 2. Fight me.