RBD-859 Hatano Yui, Mochida Akane, Isawa Ryouko: Shin Nyotai Shitsujou Kan 2 – Futari no Hangeki, Ryujo Rinko Attackers

A female prison guard fails to rescue a prisoner from the violent gang that has taken her hostage, and the prisoner is forced to become a sex slave. Three years later, the guard's mother and colleague visit the crime scene, only to witness another incident unfolding before their eyes.