This movie is different from what I watch usual but hell, it got me seated on a different level.

We dive right into the story. The scenes change quickly, there is key scene after key scene. The built up is incredible and while I understand that it's confusing, it's just so so so well done, exactly because it's so confusing. For me, it was personally hard to understand when they acted for the play, and when it was them outside of their role, but I think that's exactly what they wanted to achieve. Just like the lines blurred for the actor and the idol, they also blurr for us, the audience.

It's really thrilling, exciting and has some twists I didn't expect. I was holding my breath, gasping and squealing, because the movie was so captivating. The psychological part is just outstanding.

It leaves a lot of room for interpretation and in my opinion, movies like this, live from this aspect. They are good, because they leave you behind, hella confused of what you watched right now. What happened? Is this, what you believe, real? Was this the intention of the movie makers? These questions show me, that it was well done, because it wouldn't have such an impact, if you wouldn't ask yourself all of this.

I would totally recommend this movie. Like I said, normally I use to watch different dramas, but I love psychological aspects too and things that just blow your mind and leave you speechless and confused behind. The acting was perfect and the music supports the scenes well. Here and there some things could have been explained a liiiittle bit better (I didn't really understood the whole storyline of the play they acted for, but I think, to achieve a certain level of mindf*ck, you have to leave some things open to be questioned and not fully understandable), but overall they did a fantastic job in making a movie that just messes with your mind. The feeling they transferred with this movie is just the same as the roles in the movie feel. Like: is it still acting? What did the characters really do? What do they feel? The questions are not answered for the characters, just like they are not answered for the audience.

It's just fascinating and fits the whole atmosphere of the movie. I was so immersed into the story and the characters and geez, really, this acting was so so so freaking good. I can't mentioned it enough. Its truly impressing.

I also recommend to read other reviews and comments for the show, because I am simply to overwhelmed, to put my feelings properly into words. :'D

I will now share my Interpretation to the story, so don't read further if you didn't watch the movie yet, expect you want to read the spoiler.

For me, personally, I go with the interpretation that Young Woo out-acted Jae Ha. Just like Singer tried to surpass Walter, but failed, he tried to surpass Jae Ha, but succeeded. He blurred the lines for Jae Ha so much. Jae Ha is known for getting lost in his roles, and this is exactly what happened here, while YW was just playing into it. You can often see him smirking, which, I think, shows, that he's just playing with Jae Ha. He acted like he doesn't know shit and doesn't care about the play (in the beginning, being too late, having problems with lights etc) just to give Jae Ha a false feeling of being superior. And than YW pushed Jae Ha even deeper into the role by making him believe he really did something to his girlfriend/wife. That's what the audience should believe too. You really think YW is becoming Singer and I really thought he would actually kill himself, lol. Because it was just so well done and I totally bought his behavior as being real. He tricked everyone. What also comes to my mind is the finger he left behind at the end. As far as I understood, Singer kept the finger, because he's in love with Walter and likes to hold his hand. Leaving the finger behind, is like letting go of Walter. YW leaving the finger behind, left the impression, that he also left Jae Ha. He's know done with the play and moves on, because everything was just method acting. While Jae Ha got so much immersed, that the lines blurred and he struggles to differentiate everything. As he saw the finger, he wanted to pick it up, but decides to leave it on the floor. As if he decided to let also go of Walter. In the next scene, he is returning to his girlfriend and the eye acting leaves the impression, that she is hurt, but also understands him (she mentioned before, that Jae Ha gets lost in his roles everytime, so it's not new for her) but she loves him and waits for Jae Ha to get out of the role of Walter, while Jae Ha looks defeated. He looks so tired and also as if he regrets something, but finally decides to go with her and leave everything behind, to move on. I just love all those little details.

Edit: With "regret something" i probably meant that he regrets that he got lost in his role again, to got too immersed in the feelings and probably also that he trusted YW to a certain point. I think he realized that YW was just acting and he regrets that he fell in his trap, although he should've known better, but got lost in the role/the feelings, as usual. And he didn't just let go of Walter, when he decided to leave the finger behind, but also of YW.