The appraisal of this drama is excessively inflated. So in other words, all of these reviews literally don't make sense. It has a boring plot, always the "met in past life" trope, jokes are extremely overused and boring. I'm so sure that the only reason people even watch this drama is due to it being Korean, having popular and pretty actors, and it just keeps making middle finger/f**k you jokes and I don't care about swearing but at some point all the jokes are way too used. I seriously don't understand what people see in this show.
P.S: The female lead is actually so annoying, the way they tried to make her cool, independent but also kind, and soft inside I cannot emphasize how overused this trope is. Same with the male lead, but instead his character is new and unique but unique isn't always the good thing. The only good character in this show was the grandma, and of course the writer had to kill her off the bat.