Updated better movie quality, full sound, sorry for this problem.
Rina Ishihara is an English teacher who was transferred to a school to teach in place of a former teacher who had taken a leave of absence. In the process of teaching, Rina Ishihara discovers a student who is being bullied by her classmates, despite being warned by the head of the class, but she still decides to pursue the case to find the bully of the student Mitsuhashi, so she is targeted by Michikawa, a spoiled student who has raped many teachers at school without Rina knowing, only revealed that he was the son of his grandfather.
Colluding with Mitsuhashi, the two tricked her into staying after class and raped her, and even filmed a clip to send her for the next time...