Captive Factory Girls 2: The Revolt (2007)

Following a traumatic experience at her previous workplace, Azusa finds work at a steel factory in a remote area. She struggles with hostile coworkers, finding solace only in a friendship with a young girl named Naomi. However, a security guard abuses Azusa, and Naomi subsequently vanishes. As the mystery of Naomi's disappearance intensifies, Azusa discovers a crucial clue, leading to a final confrontation at the factory.