I absolutely have no words if you really haven't watched it yet or even considered. This drama is hands down the best kdrama of the year.

Acting:
NEXT LEVEL. I remember Moon Chae Won from her ''Innocent Guy'' Days and her performance back then was already good, but her performance in this drama. I am speechless, maybe she's even the best actress I know. You really feel with her when she's sad or happy and how she just acts every scene like SPOT ON and really cries with her heart, as if she's going thru herself (even heard she lost some weight throughout the episodes because she really was into her role). QUEEN. I hope that she gets more recognition and good roles because GURL SHE CAN ACT!!!

Lee Joon Gi was also very outstanding as the female lead. I was baffled how well he played his role since it is so difficult to have those cold eyes but idk happy aura with you. Furthermore was the FL and he really on one acting level, they weren't actors who played the role. THEY WERE THEIR ROLE.

And then Baek Hee Sung. Wow. Just WOW. I was sincerely really scared of him. Especially when he killed his maid. I was just sitting there, my hands covering my mouth and motionless. He was so good, that I cannot even imagine him being kinda normal. This role was so perfect for him and the directors couldn't get anyone better for the role.

I cannot praise the cast enough, because it was such an outstanding performance! The cast was perfectly and carefully selected. They didn't choose anyone who couldn't act or wasn't on this drama's level. HECK, even Baek Hee Sung's parents were so good like I legit cried at the ending scene (ep.16) when the dad went nuts.

Story:
Normally I'm really not into Thrillers and Mystery. I'm a sucker for romance, but the storyline got me hooked from episode one and I just couldn't stop watching. No plot hole, no questions, straight-up genius, and well-thought drama. It is a drama for everyone. Thriller, Mystery, Drama, and Love.

Music:
BEAUTIFUL. It matched perfectly the drama's vibe and intensified some scenes very well. Even just listening to 'Shin Yong Jae - 'Feel You'' makes my heart feel so painful. HONESTLY. Song with emotion and pain.

Rewatch Value:
I don't like to rewatch dramas, but I'd do an exception for this one.

All in all, it is just outstanding. No other words. OUTSTANDING. People watch this drama and do yourself a favor. I don't even understand why this drama didn't skyrocket when it was as good as The World of the Married. SIGHHH. But well nevermind. Both amazing