This isn't really a review but just my thoughts after finished watching this. Contains major spoilers so if you want read this with discretion please.

First problem, the biggest plot came pretty late, after 27 out of 32 episodes, and it wasn’t even that momentous, it was basically 3 people recognizing each other, and it had no impact to the show’s crux.

Second, they focused too much on the romance. The main couple was a bit all over the place. Romance scenes popped up every 5 minutes, even inappropriate sometimes, and often really cheesy. And what makes me mad the most is, they literally killed my second favorite character to fortify the main couple’s relationship.
Like, the death just didn’t make any sense and absolutely wasn’t necessary and other than that it was to prevent something that could’ve been avoided easily long ago. Feels like they used that in order to cover up a massive amount of plot holes and most of all it was their last solution to save the show which is viewers tears.

Third, acting is not that good. All they did good were smirk and squint, and cry. LJS still can’t act panicking right. I love him from Doctor Stranger but somehow he got worse in this one. Especially when the show was climaxing. That kinda makes romance scenes feel cheesy to me.

On the other hand, the show looks nice, good cinematography and good soundtracks. Humor was alright. TBH the biggest plot twist for me is who was the bride at that last episode. Jesus it still giving me shiver while writing this.

I think the show could have done much more. Because the 'can tell the future, messing with the time' theme has been used in so many other works that been considered Masterpiece in different forms such as anime, games, movies,... I was super hyped when I found out this show contains that material. If you’ve came across an anime called ‘Steins Gate’ or a game called ‘Life is Strange’ you’ll know what I mean. You save this person, 10 more people die because of that. The more time you save that person the more you create a butterfly effect. You save this girl 4 times to prevent her inevitable death and somehow a typhoon with a size of the moon appears and wipes away the whole town clean. So you gotta choose between stuff, stuff that as same important to you and that person, you gotta sacrifice either one of them, but if you do it good you can still get a happy ending. Now I’m not comparing these to the show, but the way they handled it, and the way they built it up was so clever and engaging and immersing. You have these first 10 episodes full of sunflowers and silky roads, and after episode 10 it feel worse than standing on Normandy in WW2. That’s how you do a plot twist. That’s how you make a show good. I was preparing all my body and my mind for something like that. I was ready to give this show a 11/10. Now I can’t tell that I’m not a bit disappointed. I personally thought they would inherit and learn from those successful factors and develop them into a new story but no, they just didn't do it. They chose to remain a formal KDrama and insisted too much on the romance aspect. They made the name of the show less meaningful. 

Well maybe it’s just me who set the bar too high. I’m totally new to this KDrama thing and after all, there are things you can draw and code but simply just can’t film it out.