This drama can be described in only one word: unbelievable. Protectiveness is surprisingly the fatal flaw in this series that leads to the characters demise. Seo In Guk and Jung So Min had a satisfying amount of chemistry but nothing too spectacular. Seo In Guk outdid himself with this drama, being able to display a cold, calculating, and mysterious character who you just are drawn towards and want to figure out. Jung So Min's acting was good, but her expressions were too stoic in this drama. I found it hard to believe the FL had the type of unconditional love for a manipulator. She literally went to bed with the ML right after the ML indirectly murdered his girlfriend/her best friend. Secrets were kept far too long right until the very end, but by then, it was too late. Tragic love with unexpected twists and reveals. Everything could have been done better but still worthwhile watch.