first of all, don't watch if you r up to thriller/mystery or crime or action . as far as acting is concerned its not that good.
the entire drama even the plot is just a joke. the female lead is just annoying and ML didnt act that good. comedy is just good.

romance - typical romance where ML gives up or does everything for her and the FL is just arrogantly scolds him for small and stupid things. of course if you are a girl you will like it.

acting- except for yoo dong man I didn't like anyone's acting. its just ok.

plot- everything of this drama is just a joke lol. the characters just don't make any sense.

this is a light hearted and NOT a thriller series. just watch it for fun and no other reason.
man i wasted 6 hours expecting it to be thriller or mystery.