I recently completed watching this drama and I personally don't like it that much. The story was pretty good with humor, romance, and all the artists have played their roles brilliantly, and the story is truly amazing but not that good because I watched many time traveling dramas. You know whats got wrong in a romance fantasy drama? It’s just that most of the time endings are disappointing. Its same with this drama too at some point but they do correct that with fast forwarding the life and then they give happy ending in the end.
I won't stop you from watching it if you so want; everyone has different tastes in dramas. Perhaps you would appreciate this one. The story of this drama is that a 26 year old son goes to the past where his mom is 16 and tries to get her to marry her “husband” to change her fate. You have to take the story for what it is and for a 20 episode series with 30 mins each, it's hard to unpack a lot.

I already watched same story drama named "twinkling watermelon". Where son accidentally goes back to the past and meet his father and then he tries to prevent an accident of past where his father became deaf. And he also tries to match his father with his mother because The future will start to change negatively when he travels too far in the past.

Overall, it's upto you if you want to watch this drama or not but I personally don't like it that much because I feel like there is lack of humor, romance and production was also bad. And it has some unexpected cuts where story suddenly changes especially when new episode starts.