School of Youth 2: The Unofficial History of the Gisaeng Break-In is a strange sex comedy set in a village school in the late Joseon period and portrays the shenanigans that go on there.
There are several explicit sex scenes, including some nice cowgirl and doggy shots. If you like Korean girls in historical Korean robes getting down and dirty on the floor, you’ll enjoy the scenes if you can wade through the dull comedy in between.
Information about the 2016 film in English is sorely lacking but we can tell you it stars Ji Eun-seo, who was also in the erotic film Mutual Relations.
It is a sequel to the 2014 film School of Youth: The Corruption of Morals, which starred Bae Seul-ki and Sung Eun (below).