Mechiku -Injoku no Shuyoujo-

牝畜～淫辱の収容所～

Yuriko, a married wife and falsely accused of homicide.  Youko,  a hot-rodder leader of Night Angel, accused of assault and damage to private property. Yuriko and Youko are sent to the female prison without knowing what nightmare awaits them there. This prison is a special one, any prisoner sent here will never commit any crime ever again...however there are a large number of prisoners that keep disappearing without leaving any trace. Kaori is an undercover detective that enter this prison in hope to find clues about her missing sister and find out what is going on inside this place. Etsuko is a human rights lawyer investigating the rumors about this prison as well. 

These woman have to be very careful of the head female guard Sakie if they want to find the truth...