This drama was on my watchlist for quite some time. I finally finished it. So following is my opinion about the drama.

The story had its cliche moments. It is nothing out of the box (But that is true for quite some ROMCOMs) So, nothing very special in the story but t is well executed and enjoyable.
The story gives a glimpse of the hard work and struggles involved in the life of idol groups.
Loved the bond among the LUNA group member and how it evolves along with the story. Not just the bond among them but we can see the character development of each of the group members. Also, the twin sisters' bond development was meaningful. Even though short, it didn't feel rushed and fit right into the drama.
Loved how each character was given its own space to evolve and shine.
The entire cast just looks amazing and the acting was fantastic.
The main lead looked amazing together and the romance developed slowly and beautifully. The pace of the drama was just right.
Beware of the second lead syndrome!

Overall, If you like romcoms, you should definitely give this a try.