RBD-838 — New Slave Castle

A long time ago, Shinobu, a maid who works for wealthy Daisuke Saegusa, was raped by a drunken Daisuke and gave birth to Kaoru. - Daisuke's eldest daughter, Aya, and his second daughter eventually learn of this fact and abuse Shinobu. - Unable to bear the abuse from them, the mother and son plot revenge against the Saegusa family.