There are plenty of mature scenes, just not explicit sex scenes.
Many R-rated Korean movies perform sexual scenes, to a point they show the women's boobs, but this one lacked a lot in that way. When they kissed, and she stopped, I knew that the drama wouldn't go further than just pleasuring Ji Hoo with tools. Kind of disappointing.
I just hope that Min Young's role is not cold, boring with a poker face for 90% of the drama because her previous project was the same, and we only get to see her once a year. She is one of those rare actresses who can be extremely extroverted, energic, and loud, but not cringe at the same time. Such a waste.
Ah yes, explicit propaganda to support Chinese communism. Am I expecting corrupted lies about the Japanese as well?
The subber midway the drama: https://www.youtube.com/watch?v=FYjh8WM5lnA