As the title says, this film is basically a porno. 90% of the scenes are sex scenes and the plot is abysmal. They tried to set up some political/palace intrigue but it was overshadowed by all the sex. I'm not a prude, but it was just...too much. The actors did well with what they were given so it isn't all that bad. Shin Ha kyung also has a pretty ripped body in this film so yeah.

TLDR: You are better off watching a porno. If you are looking for political intrigue/historicals, watch empress ki or queen seondok instead.