RBD-706 — The Cage Of The Lewd Beast, Saiharu Natsume

Mizuki and Chiaki are twin sisters, but unlike her excellent older sister Mizuki, Chiaki repeatedly commits delinquency and is sent to prison by Mizuki. After being released, Chiaki vows to get revenge on her sister and imprisons Mizuki in a brothel, while she herself disguises herself as her sister and moves into the newlywed family...