It had potential and some moments/dialogues/ideas that stood out but the execution was downright blasphemous because I simply cannot believe someone would actually pay for a story/plot that is so paper thin it may not even exist.
Side characters except probably for Ju cheon seok were downright caricatures which is sad because those characters had potential. The chemistry and the tension between the leads carried it until a certain point but after that...yeah.
I cannot even call it tropey because that would mean they have done a good job about the tropes because they had the right leads who could have done justice to a solid, tight storyline with tropes done right. They tried to do many different themes and ended up a mess. A shame honestly.