Okay, so this series started as a seven for me, I'm not a huge fan of any of the actors, so I went in with no bias as the premise sounded interesting. The first two to three episodes were quite good, a bit slow but because I had high hopes I gave it the benefit of the doubt... but then it all fell apart. The fl just got dumb and dumber, the ml just basically turned into a gaslighter under a disguesed as a man in love, so so many plot holes, side characters no one cares about, and many questions were created just to be left unanswered. When I reached the 10th episode I felt like I watched a 30-episode show where nothing really happened, most events were just fillers, new plot twists got added randomly, and so many more stupid things happened to make this whole show into a disaster. I sped through the last 6 episodes like lightning because I had gotten so far and didn't want to waste all my efforts.

As I write this, I originally wanted to give it a five, but the more I write the more I feel like it doesn't deserve it.

Spoilers from here on:
All the things that ruined this show for me:
-I have no clue why they decided to go the cheating route. No matter what the ML thought ro felt he was still dating the SFL. Granted she was a b**ch herself but still, you can't really like a cheater.
-His "love" started because of a spell. There was no reason or any event to trigger true affection. So how did they fix it? With the classic "actually he has loved her all the time... like since their past lives" Please... that's so freaking dumb and overused.
-He was sick, haunted. But then suddenly he wasn't for the longest time, but then it came back again randomly. like what??
-FL just carried the love potion around in her tumbler and every single man just decided to drink it. Like girl, you've already used it on the person you wanted (not really lol), so either pour the sh*t down the drain or keep it at home.
-SML just randomly fell for the FL because "oh, wow. now she's liked by another guy huh, I'm suddenly interested." •ᴗ•
-Why do all Korean dramas just NEED to have their main leads have met each other before? Its always: childhood, past life, they met one time before and one saved the other. UGH! Not to mention, one of them always has some sort of trauma.
-And WHy, OH WHY!? do they have to break up for like half an episode just to get back with each other again? Its just lame.
-also the past story was just lamer... it could have worked with better writing but this show lacks that along with all sense so...¯\_(ツ)_/¯

Things I liked:it was fun
-I liked the sass of the ML
-and what else... Um... FL looked really pretty in her past life ৻( •̀ ᗜ •́ ৻)
-Oh wait... The main leads did have good chemistry I'll give them that