This show really made me upset in that it was seeming to go pretty well, but then the story got super lost.

While not realistic, the start of their relationship was super cute and exciting and I was excited to see where things were heading. The story of her past and her parents was brought up, but never really done anything with? Same with his backstory with his mom. It's brought up, but never done anything with.
It just drops all the major plot points brought up in the first 6 episodes or so and changes it with a car crash. I literally could not even tell if she had amnesia or it jumped forward in time.. It also made absolutely no sense the way this "time-line" plays out. They just have sudden memory loss and his "best friend" comes and basically tricks JoJo because he knows everything and she doesn't. It's really messed up, but even Sun-Oh was the same way to him in the beginning of the show.
Most of the background characters are really annoying and sort of frustrating. Gul-Mi is so insufferable and I could hardly watch any scene that she was in. She blamed JoJo for her parents wanting to literally murder her and them having to take care of her? Also tried to get with Sun-Oh any way that she could, if she could spill a secret she tried. She went out of her way to be a horrible person to JoJo and Duk-Gu. His backstory is another that drops off as well. It's insinuated that he created Love Alarm, but never brought up again. Him and Gul-Mi's story never goes anywhere either from what I've watched - which is slightly disappointing because it could have been something to make her character actually a little likable.
Just too many plot holes and too many things that didn't make sense at all. It could've been really great.