Seito-tachi ni Sarashimono ni Sareta Onna Kyoushi Hen 3

Abuse of a beautiful teacher. Verbal abuse, forced into incredibly embarrassing poses.
Hitomi Tachibana, a beautiful and intelligent female teacher at a prestigious private school,
is now being humiliated by her fellow teachers, junior female teachers, and the janitors. The demands for humiliation gradually
escalate. Forced nude party tricks, nose hooks, enemas, teaching in perverted costumes,
humiliating naked karaoke, and if she refuses to clean the toilet naked or doesn't like it even a little,
a shameful punishment awaits her.
Before she knows it, she has been made a sex slave by all the students at the school and has been transformed into a human toilet. She
is subjected to the utmost humiliation in an incredibly embarrassing outfit.

[From Official Website http://rapture1970.blog.2nt.com/?no=3]