Story: Story of a guy who works for a company is betrayed by his employer who then wakes up in the body of the youngest grandson of that's company's founder. There he starts his plan of revenge which is to take control of that company.

Acting: LSM: What an amazing actor is he. He was so perfect for the chairman's role, every scenes of his was a standout. He played a tough, distrust, cunning and a vulnerable guy so well.
SJK: Loved his acting so much, I think he definitely went beyond his peak acting for this. Such a good actor that he has good chemistry with a newbie actor(Tiffany).
SHB: Honestly I didn't enjoyed her acting at all, she was good for some time but most of her acting felt plain. I think the role was not suitable for her.
Other actors: All the other actors did an amazing acting, they were so good in displaying every emotion they were being told to show. Their cunning smile, villianious laugh, desperate cry, distraught everything they showed were perfect and on point.

Characters: JDJ/HW: He is smart and cunning as he knows the future but also knows what to do with that information, he is good at manipulation and would take a bait if it means it would destroy his enemy. His relationship with grandfather goes from him not getting acknowledge as a part of family by the grand father to him being his favourite grandson whom he can relate to most.
JYC: Founder and head of the family who loves his company and goes on saying that his company is his favourite child. Always being assertive and doesn't back down from his problem. Even without the future knowledge he is a very tough and unpredictable person.
JSJ: Eldest grandson who always put up a fake mask of smile, righteous and cool guy infront of other but he would do anything to make the company his.
HM: Wife of JSJ who is loyal to her husband only if he can secure the chairman position for him and would pass down to their so. She is extremely cunning and well connected who has given a good competition to DJ.
LPO: The grandmother who everyone thinks is a nice person is actually a women who would go to extreme length to make sure her real son/grandson succeed the company.
JHY: Only daughter of the chairman.Not so smart and gets greedy easily to the point that she ignores that she is harming herself.
JYK: Eldest son of the chairman who is a pushover and always desperate to show his father that he is a capable person.
JDK: Middle son and only among the three siblings who has some knowledge of business though he gets tricked. He is also desperate to get acknowledgement from his father as he thinks he is more deserving than his older brother.
CCJ: From prosecutor who was under the shadow of his wife(JHY) and her family to a law minister. He is not capable of making his own decisions, he does what has been told by whoever that will benefit him.
OSY: An investor and a loyal partner and a friend.
SMY: She is prosecutor who gets in relationship with JDJ and is also one who goes against his rich family. She doesn't gives up and is smart to know what actually is happening.

Likes: There are so many things to like, some are listed below:
• Amazing acting by the cast especially LSM and SJK
• The grand father-grand son duo was so amazing to watch.
• "Good guys" didn't always win, they faced some loss too which only made the story more interesting.
• How JDJ manipulative his whole family and plays them against eachother.
• Even though it was for one episode the child actor playing JDJ did an amazing job.
• Antagonists are cunning but also show some stupidity in the moment of heat.
• JDJ's relationship with his mother, father and brother is very wholesome, they are the few of the good guys by his side. A supporting and caring mother, a father who is willing to become a bad guy to help his son and a funny brother who is the heart of their small family.
• How the bad guys are taken down in every couple of episodes is very satisfying to watch.
• Music and OST is so beautiful, energetic and thrilling too
There are other things too that I have not mentioned.

Dislikes:•The ending episode, if felt a totally different episode from rest of others which is written by someone else.
• Ending doesn't make that much of a sense, is very unsatisfying and maked the episodes 2 to 15 unnecessary.
• FL and the actor: The character is very under utilised even for a one character centric drama. Also the acting felt off and not that good compared to other actors.
• Romance: As the FL and ML had little screentime together their romance felt off or maybe unnecessary.
• Role of the granddaughter is very minimal, as she is actually a smart person she could have been a good match against or even in favour of JDJ.

Overall: It's an amazing drama with high class acting and good twists and turns in the story which keeps the viewer engaged but the ending and the whole last episode could be huge let down.

Ratings: As a critic: 9(10-1 because of last episode).
As a casual viewer: 10.

PS: PJH and JHY(actor playing granddaughter) look really beautiful and hot and they are really talented too. Hope to see them in a first lead role.