This movie has a duration of 147 minutes, which is nearly 2.5 hours. I feel like it would be better if it was shorter. It focuses mostly only on two people and their relationship with a few other characters and very few location changes and occasional flashbacks. The plot moves forward well, but still it is easy to lose focus (at least for me) so I watched it divided into three parts during one day.

The premise and North Korean setting during the 1970's is interesting as well as the "Serve the people" title, which is also an ongoing theme in the movie and it plays an important role, both in the setting and in the character's relationship too. Speaking of their relationship, I'm honestly still confused about it, it started off as a purely sexual one but we also got a handful of scenes that could easily be interpreted as romantic. Maybe it was intentional: to show that it wasn't just black and white and how if the circumstances were different, their relationship would still progress like that.

The characters didn't really stand out for me but I want to praise the lead actors, they did a really great job both in the normal scenes (one emotional scene with lots of shouting was so well done) and the sexual ones. There were A LOT of the latter but they played an important role in the movie.

Overall, I give the rating 7.5/10.