It took me a bit longer to finish watching this because this drama is so intense.

This was a beautifully shot psychological thriller. I have to mention that I love the soundtrack too. I truly feel the frustration while watching this drama, which brings out that helpless feeling from under pressure from society to meet certain expectations, and also from abuse of senior power, while feeling lonely, fighting the battle alone against the world. The series has done a superb job at bringing out that cramped and gritty feel and depressing mood of the main character, Jong-woo's living condition, as well as portraying his deteriorating mental condition and sanity as the drama progressed.

If you like psychological thriller, definitely give this a watch.

Rewatch value - I almost never rewatch anything, same goes with this one.