HMN-755 Seven girls were imprisoned in a secret room and subjected to rape, pregnancy, and sexual assault. The seven girls were forced into a room the size of a six-tatami mat and subjected to brainwashing and control.
MUDR-335 The Making of a Girl: A Beautiful Girl Imprisoned by a Perverted Video Uploader [Imprisonment, Training, Breeding, and Becoming a Masturbation Pet]
JUR-364 A heavily convicted female prisoner is taken in by a sexually voracious middle-aged man in a dilapidated apartment during her escape, where she experiences seven days of intense but brief sexual intercourse.
GTJ-159 Torture of Female Prisoners
Yui Hatano - The Strange Female Prisoner Wearing Underwear
MUCD-301 Modern Transfer. Young magical girls are imprisoned and their bodies studied and developed. Four hours of masturbation transforms her into the ultimate sex slave.
MUKC-038 Record of the Imprisonment and Research of a Girl from Another World
MUKC-039 Record of the Imprisonment and Research of a Girl from Another World
MTABS-007 The Brainwashed and Imprisoned Girl
BONU-038 Married woman imprisoned in an apartment - 24-hour relentless hell, anal training and deep throat training
MYB-013 Japanese Elegant Bondage House: The Strange Story of a Female Prisoner with a Mask, Volume 14
This is how female prisoners are used.