I'm a sucker for lookalikes switching identities, it's a classic move xD I've probably seen every american movie out there with this theme ;p
unsurprisingly it's my first drama with Seo Ji Soo, but she's a natural! and pretty too~ I specifically loved Jung Da Eun as a character, and she pulled of the 2 roles so well, specially the way she changed her tone for each character (usually plots like this get unrealistic with that point). and she has a great singing voice too~
90% of my rating is for her, 6% is for mini queen Yoo Ari and 4% is for Yoo Ji Han's smile ;)

the public and law honestly needs to condemn saesangs, and this drama was a nice realistic outlook of the hardships of idols, that's why I loved Yoo Ari, she was a true genuine fan, though it's better to not engage with saesangs ;)

I have to say though, Shin Jun Seop was not that good (that's why I'm removing a 0.5), though his singing voice was nice~

the music and duet were nice too, and my rewatch values are 1 or 10, and I prefer to hope for more acting roles for Seo Ji Soo, and a longer vr of this drama xD