Female Prisoner Ayaka: Bitch-Training Torment (2008)

Original title: 女囚アヤカ いたぶり牝調教

Ayaka is a bored housewife, stuck in a very ordinary and loveless marriage. Her only escape is to the fantasy world she creates. She begins having dark and graphic nightmares about being in prison and getting molest by the prison guards and warden. The plot thickens as Ayaka's husband's financial hardships cause both of her worlds, the real world and the imaginary one, to collide.