i have rewatched this jdrama so many times and i will DEFINITELY do it more. this show had me at the edge of my seat all the time. the plot was amazing and something i have never seen before, with a flawless delivery from the OUTSTANDING cast. the plot twists at so many points through the show were jaw-dropping and something i still think about to this day, months after finishing the show.
this show may not be for everyone; it contains a lot of gore and nsfw. but if you're fine with that kind of stuff, i highly recommend watching it. the overall concept of the show is addicting and will get you attached to it so fast!
i HIGHLY recommend watching this with friends, i personally did and it was so fun sharing theories about the show together!