This drama gave me such a high expectation as two of my favourite actors are the main roles of it. But the drama was quite disappointing. I'd love to see Ji Chang Wook and Won Jin Ah in another drama with a better writing.

*has spoilers okay

//STORY//
Now this is the part which the drama really fucked up on. At first you see this cool concept of cryogenics experiment that went wrong. It even had an antagonist to appear as the villain of the story. But this was just poorly executed. The start of the drama really had me on high hopes but later on I just gave up on the story and just started focusing on the scenes between Ji Chang Wook and Won Jin Ah. I personally think the drama could've done WAY better but it was just a mess. The character development in this one is also quite terrible. Especially for the antagonist of the drama, it was kinda dry. So I believe most people just gave up on the story itself. The ending came quite bad. Atleast it was a happy ending. If they ended it with her being stabbed and dead the drama wouldn't get a 7.6 rating and instead a damn 4 or 5.
I don't even know how to explain the story but overall it was bad and that is what's important.

//ACTING//
The acting was what saved the drama to be honest. Especially that shower scene omaigodd( ͡° ͜ʖ ͡°). But the actor that didn't appeal much to me would be Kim Bup Rae (Lee Hyeong Du and Lee Seok Du).

//OST//
I don't really pay attention to the OST's of dramas but this one wasn't anything out of the ordinary. Dramas like While you Were Sleeping had good OST's which really stood out to me and I would be able to recognise it if someone was listening to it. So the Music in this drama wasn't outstanding enough.

//REWATCH?//
No. I probably won't rewatch the drama unless it is for the scenes between Ji Chang Wook and Won Jin Ah. That is the only thing I would rewatch.