I'm giving it an 8.5 rating overall simply because I felt happy watching this drama. I initially watched this 'cause I loved Hye Yoon's duality from Sky Castle and Extraordinary You. I've already watched tons of time travel themed series and I still loved this one. I'm not really into romcoms (I prefer thriller, mystery, crime, etc.) but I watch them after heavy dramas to balance my emotion. Some shows are meant to be enjoyed and not overanalyzed, it's just a fantasy after all so there will be plot holes.