The story has great potentail and was realy well built until all the mystery started to reslove honestly I was kind of disappointed and the writer focused so much on the love line and kept dragging the love triangle until the last minute it realy affects alots of the chrachter development The acting and the cast was amzing everyone is a perfect match to the role the actress who played sooyoung was realy amazing it's hard not to hate her Kim Sohyun surprised me she is that good and she's only fifteen it take only one gaze to differentiate between the twin Sungjae did well he made taekwang too lovable joohyuk was decent too. the ost are realy good it's one of the best especaily reset and return rewatch value I don't realy rewatch drama unless it was super good it only happened 2 or 3 times before so I shouldn't judge this category overall it was fun to watch this drama