The story starts when LBX's present life is falling apart. Her marriage to ZY fell through because he fell in love with their classmate TT who LBX considers her bestie. Desperate to win him back she did some crazy stuff but it didn't work out and by some stroke of fate, she gets to enter a parallel universe where she is back in senior high and gets a different perspective of her life back then.

My Opinion:
- ZWS is a wallflower in LBX real past he literally is in the background and fits much there that he goes unnoticed and a rare friend and man in her parallel world. No man would sacrifice that much for a girl IMO.
- In LBX real world she forgot her friends and wrapped herself around ZY. Her life is hin.
- The difference of ZY treatment of LBX in the real and parallel world is so obvious. I kind of think he really liked her but changed overtime. But I don't like him cheating with HTT.
- HTT is  such a fake friend. She cajoles LBX to pursue ZY but likes him too. She enjoys embarassing her and it's no wonder in the parallel world LBX her a hard tine.
- GG and YCY is almost the same in both worlds, go getters ready to chase their dreams and  except for the fact they are in a relationship in the other world.
-MZ the bad boy and good friend that should not fit the puzzle but is perfect to complete the gang.

I liked:
-No matter how she changed in the parallel world, the real world is the same.
- LBX journey to find about ZWS after she returned. Painful as it is.
- ZY got his karma. Lol.
- MZ is a friend we all want in our lives.

I didn't like:
- How could her brother live a nonchalant life after all that?
- I normally don't have issues with open endings but this one, this one, just made me shout out in frustration.

At the early part the strange man LBX met said her going to another world is a fragment of both her past and future and that the world she looks for behind her is in her past. Both statements are true and was well embodied in the show.

The actors are all great but I must say the main leads were perfectly aligned withbtheir characters that it overshadowed the others.

The osts are good. I really love the song Cold.

I might watch this again but I don't want to compare this to reset or someday or one day. These shows have their own strenghts and clealry defined difference from shining for one thing.