The Women's Prison Lesbian Hell (1979)

女刑務所・変態

aka 女刑務所（スケムショ）　変態 · ザ・女刑務所 レズビアン地獄 · 女刑務所 変態 · Sukemusho: hentai

A young and beautiful female instructor. While she has a physical relationship with a guard, she also serves as a spy for the warden. She disguises herself as a prisoner and sneaks into the cells, cleverly finding out the prisoners' secrets and reporting them to the warden. As a result, a thought criminal commits suicide, and a colleague who became involved in lesbian relations with a female prisoner is punished.