After school, a group of high school girls drink and chat while watching a DVD. Their conversation inevitably turns to bashing their homeroom teacher, Aoi Takashima. What seems like an ordinary, carefree moment takes a dark turn when the film they're watching is revealed to be "Female Body Torture Research Institute." Intrigued by the content, their mockery escalates wildly—until they declare, "Let's torture the teacher!" What follows is a shocking revelation of torture unleashed by these mischievous girls.