I really liked this drama. It kept my attention throughout.

What I liked:
-Han Suk Jin was amazing. He was very believable as Jae In and was my favorite character in the show. I loved when he would put people in their place, when he wouldn't take things lying down, the fact that he would do things his own way, his reasoning for not wanting to marry DaDa at first (he didn't want her to suffer), etc.
-Jeon So Min as Da Hyeon. I like that she would give just as good as she would get. She wouldn't let people see her sweat. I just didn't like that she constantly kept saying I don't know your grandfather to Jae In. Why not research it? There were articles about Jae In on the internet so why not search up his grandfather especially since SH Group was his creation. That was annoying.
-The main couple had great chemistry and it was cute seeing them not realizing they were in love with each other. They had cute interactions, great kissing scenes and I liked when Jae In would tease DaDa.

What I didn't like:
-Jae In's ex- she kept harassing both Jae In and DaDa. No matter how firm they were with her or how much they put her in her place, she still would keep coming around. She comes around and says she loves him after being apart for 3 year. ????????How Sway? And at one point she told DaDa she was being pathetic. What was pathetic was her chasing after a man that didn't want her and made it clear that he didn't want her.
-Jae In's little sister- She was not needed and added nothing to the show.
-The last 2 episodes- Episode 15 dragged a little, thankfully not past 1 episode unlike some other dramas. I know it was to make the audience feel what it was like for them being separated from one another, but it was still a bit draggy. And the last episode was just too fast paced and introduced more topics that I felt one more episode was needed to smooth everything out.

Nevertheless, I enjoyed this drama, recommend it and will definitely rewatch it again.