The acting isn't bad at all, especially compared to other idol dramas that aired this year with bigger names. I liked both lead characters, they feel unique to typical drama characters. Won't be surprised if they'll be the reason to watch rather than the plot.
I'm genuinely impressed at the quality of this show. If you had low expectations for this drama i would say watch it. The plot is kind of basic however, I liked how the broody male lead became more charming as the series progress and how the love triangle wasn't the main focus, they didn't drag the rivalry, there were no huge heartbreaks even the supposedly evil second female lead turns out to be kind and considerate. I watched this after DAYS so I kind of prefered Jung Ji So's acting there tough, she wasn't bad here either, it just that it's like her character in DAYS was made for her but, Lee Jun Young did an amazing job here.