Haven't read the book, but acting is cringy. Especially by main female lead. It doesn't come off as consistent and at times feels awkward. How the main lead acts with the people around her is weird. It's the delivery of the lines. The writing is bad too. Scenes that don't need to be there were written in. For example, main lead checks into a hotel in the first few episodes. There's no need to have that whole conversation with the clerk desk. Also the sex scenes are too awkward and random. Feels like they were added for filler. There's no chemistry amongst the characters.
Bad writing. Bad acting.