At the time of my review, this drama is still airing. So, I cannot rate the whole drama but I can let you know whether or not I think this drama is worth the watch based upon the first episode. I do think it's worth the watch but the storyline was totally different than what I expected it to be, based solely upon the title of the drama and the drama's profile image. From what I can gather, there are 3 stories going on within episode 1 (and probably the rest of the series), and I believe at some point in the drama we will see how the storyline intertwine. This drama includes the story of a rich family with a bratty daughter. A story of a middle class traditional family with a handsome son who is struggling (note this statement is not the case), and then another middle class family that is not as traditional, with a handsome son who has a nice job. The con thus far is the cutesy and naive type of behavior from the female lead character. In the first 3 episodes the female lead calls her fiance oppa at least 50 times, it's a bit annoying. I hope directors would stop portraying the cutesy/shy character trait for Korean women characters over the age of 21. Women don't have to act cutesy and shy, in order to be modest and respectable.

Side note: While it's a 120 episode drama, the episodes are only 30 minutes long, unlike most dramas which are 1 hr 15 mins long. So really this drama would have 45 episodes if each episode was 1 hr 15 mins.

UPDATE:
By episode 3, you will get a clearer picture of the storyline. I don't like the female lead character (not the actress) because they made her character clueless. I believe this drama should have had a more serious undertone, rather than a fluffy cute undertone. I was thinking this would be more like the drama The World of Married, but it's more like My Golden Life but in a not-so-good way. My original rating was a 8.5 but after episode 3 I dropped it down to a 8.0, and now after watching episode 4, I am dropping it down to a 7.5. By episode 5 it does get better.

I don't like weak female leads (see the definition below). Watching the female lead beg her husband to love her and their child, and to be with her and their baby at the beginning of episode 7 is not relatable to me. She has been in denial for the last 5 episodes, especially the last 2 episodes. Does she really expect things to go back to how they were, even if he decided to? For a woman being a single mother is one of the most scariest things that we can experience, but raising a child with an emotional abusive, cheating dad/husband should be just as scary. I would never want my child to grow up with a toxic parent. Sometimes being a single parent is a better option.

What makes a female character weak?
A weak female lead is someone who doesn't use wisdom, allows the male lead to ruin her life, while she sit idly by for the sake of love (leaving is a really great option, that female leads rarely choose to take up), and chooses the toxic male lead because they had chemistry at one point.

What makes a female character strong?
A strong female lead character is not necessarily someone who knows how to fight physically, but is a female character that
1. Uses wisdom most of the time (not all the time) - A lot of the female damsel in distress characters lack wisdom. They act on impulse, and make decisions that almost always lead them to depend on the male lead or second male lead for the whole drama.
2. Does not allow the male leads to ruin her life, while she sit idly by for the sake of "love," that really isn't love -Dramas tend portray a false image of love when it comes to romance. Love is not a woman taking abuse (verbal, emotional, or physical abuse) in order to be with a man. Almost always in dramas we see that the female lead is deceived, manipulated, or intimidated into a situation by the hands of the male lead. What's the female lead response? They either stick with the male lead through heartbreak and pain, or get back together with the male lead eventually. We often see the male leads choosing their family, revenge, or their title over the female lead, and or we see the male leads leading the female lead on a romantic chase, metaphorically speaking. The female lead in dramas while angered, end up being okay with being the last priority on the male lead's priority list.
3. Is free to choose who she love, even if it's the second lead and not the first - For goodness sakes, dramas will have people thinking that females love attractive toxic men, while hating the good guys who are caring and attractive.

So, yeah... I am dropping this. Unless I read that it gets better, I don't plan to pick this drama back up.