Kôkô kyôshi: Hiki sakareta shitagi

Original title: 高校教師 引き裂かれた下着

Directed by Satoshi Shimomoto

Misaki is a highschool teacher who witnesses the rape of a cleaner in the school bathroom. Afterwards, she goes to the home of Takuya, a student who hasn't been attending school recently, where she is drugged by Takuya's lesbian mother.