...and this was ok, not great but also not terrible.
I think the premise is interesting at the beginning and the story of her going back to 98 becomes more of a classic romcom what was ok for me.
I think it was around episode 8 when it started to go a bit downhill for me, it started to drag and felt slower at the pacing. Still, the thing I found the most annoying at that point was the overall introduction of him also as a time traveler, and mostly the fact that the story at that point is shown in a very scene by scene way and becomes confusing. Until that point you're wired to think all the time in her going back to the past, but then he's doing the opposite and instead of showing the story in a linear manner like it happened with her, and what would have made this a lot easier to follow, they keep showing things simultaneously and I got a bit confused a couple of times. Later this seems to improve again, but once they show who is the real culprit....well, I started yawning, it became so melodramatic and so cliché. Motive? who needs one when you can just introduce a psycho that just does things because yes.
It definitely got less interesting for me from that point onwards and I found episode 11 the most dragging of all, especially also with Kwon Min Ju. Sure, I felt bad for her and I could understand where she was coming from, but she was using victimism and suicide to hurt others at the end of the day. She "doesn't hate" Han Jun Hee but tries to basically hurt her and everyone else. The reason for her to get better later is weak as well. Overall I was not very satisfied on how that was portrayed and tackled.

Jung In Kyu was very melodramatic at the end of the original timeline, it was just bad in my opinion in taking the blame for something he didn't do. He certainly didn't think enough there and felt like an impulsive regreatable teen reaction and all I could think was "this is lame".
The ending is ok but also leaves many questions about all the other characters since it only shows the main two. Funny enough the main question I had is what happened to Oh Chan Hee, did he go on a killing spree and was never caught in the new timeline? As a child he already was showing an interest in Min Ju because of his brother's photos, did he try to kill her later on? Or maybe no because she was not depressed and so not an "easy" prey anymore? did he kill someone else instead? (obviously I assume even if he tried he didn't kill Min Ju because Nam Si Heon mentions her in the bus like she's still alive). Did his brother become a stalker of Kwon Min Ju? I mean, he kind of already was with the photos and all.

The moments of resolution in this drama generally felt a bit anticlimatic for me, when FL manages to get control of Min Ju's body again before the jump I was not impressed, the way they meet back again in the end didn't impress me either. Maybe they didn't have that much chemistry so it left me a bit flat? Maybe because other than the story we don't get to know much about each of the main characters nor they do share that many bonding moments? not sure if that's the reason, I can't fully pin point why.
Something that also bugs me is the fact that only towards the end we learnt that Jun Hee and Min Ju can communicate with each other, like what? shouldn't this have been a thing during all the drama then? it would have changed the whole thing in my opinion, so to be honest I do count this as a plothole, and if there was a reason only then it was possible they didn't explain it at all. Is it just to be more melodramatic? Otherwise they could have met, communicate, raise concerns and helped each other along the way, what would have made the whole story a complete different thing.

Overall I think this would have been interesting and a bit different if the series had been longer and they had also focused on the characters relationships in the new timeline, or had even introduced the idea of paralel timelines because of the change. I find it a bit unsatisfactory when shows end with a reset.

The reason why they could time travel is not really even suggested either so the whole idea of the time travel is kept superficial, I'm ok with it in general but if someone is expecting more in-depth in that respect this is not it.
The song chosen to be the one for the cassette very annoying after a while.

Generally it's an ok watch but forgettable.
I know people will tell me the original is so much better, it might be but I've also read here in the comments this one generally follows the plot of the original very close, meaning, I'm going to find the melodrama and the culprit as annoying as in this one so I'm probably going to give it a miss for now, I might watch it at some point when I don't remember this one at all.