This is going to be a very short and very harsh review. Especially towards Song Joong Gi.

This, in essence, is extremely lazy overall. Everything except the production quality and most of the actors. The screenwriter basically just wrote a drama to give an excuse for the main character to be "cool, clever and smart" when in reality, he's not really none of the above.

Main male character wakes up in the body of the rich son of the rich family he used to work for before his "untimely death", with all the knowledge of what's to come in the future. It's not really difficult to "manipulate" events he already knows how it will play out. He knows the answers to the test. All the while, he's showing off this knowledge as if he's being wildly clever about it all. Boring. Lacks depth. And his only motivation throughout the entire drama is revenge for his own death for the choices he made himself that got him there in the first place. I mean, he worked for this God awful rich family for years and witnessed how ruthless and cold-hearted they can be. Did he really not see the backstabbing coming and thought that his dedicated and loyal years of service would make him any more special than any other "dedicated and loyal employee"? What made him think he was any more important than a disposable paper cup? And then when he dies, he wants revenge despite knowing they were double-crossing, greedy and lying people to begin with. Stupid. Dumb. Shaking my head while contemplating why I wasted hours watching this crap drama.

Sorry but I'm not impressed by Song Joong Gi's picks in dramas or his acting chops. His choices in acting roles are extremely boring and bland. He keeps going for the same "cool and collected" characters that are mega-macho-masculine with no real depth to their personality except to look cool while doing it all. Maybe he actually has some acting talent but he keeps picking the same roles over and over again so I can't tell until he picks more interesting roles. Now, whenever I see a drama with Song Joong Gi as the main, I immediately pass.

The only saving grace is Lee Sung Min who is a fantastic actor with versatile talent and picks interesting roles, unlike Song Joong Gi. Lee Sung Min was half the reason why I watched this drama. The other half was me naively thinking there would be some big cool mysterious twist but it played out exactly how I thought it would, except the ending. The way they tried to make sense of a doppelganger paradox does not make sense. Writer basically was hoping that the audience were all unintelligent dumbasses and accept their lazy-ass writing.

I will not apologize and am not sorry for this review. This drama was awful. Writing sucked balls. Song Joong Gi was extremely tedious to watch. And ending was.......well, just no words.