This is the 12th film in the Female Teacher series. Better known by its English title: Attacked Female Teacher or Assaulted Female Teacher. Note that as in others in this series, the central theme is rape. Each of these movies stand on their own so you need not have watched the others first.
A woman is raped while walking home and because of this her boyfriend leaves her. Five years later as a teacher she has only short-term sex based relationships with both young and older men.
There are some inconsistencies that I am still not sure of. The story synopsis says she was a student at the beginning but it's not made clear and the actress and the boyfriend actor looked at the beginning too old for school. Plus she had her own small apartment at the time. One young man she has a sexual relationship with is I think supposed to be a student but again, the actor looked way too old to be a student.
This is a Pink Eiga film so has numerous nudity and sex scenes though of course all softcore. The story seems to mainly connect the sex scenes. Unfortunately, while it could have been very interesting with the characters, it rarely gets beyond the sex. It still was a bit interesting, just not very interesting. Should also note that the rape scenes were a bit more disturbing than other films in this series.
This is the weakest of the films in the series as far as story. It just seemed the script to not be fully coherent. Even a couple of other characters that appear earlier are kind of thrown away later when I expected to get more in-depth with them. Feel free to skip this one.