Onna Kyoushi Otoka "Midara Nawa"

The clever and beautiful Miss Otoka decides to try and solve some bullying going on in the classroom, but her plan backfires and she ends up the victim -- and violated by her pupils! Even worse, the whole thing was witnessed by Kobayashi, an academic advisor!

Kobayashi brands Otoka as a "teacher who entices and seduces her students" and orders a background investigation on her when she denies it. However, little did she know that it was all a despicable trap...

[From DLsite English]