An amateur female masochist, Keiko, undergoes intense sadomasochistic training as a livestock pet in a barn, completely submitting to a sadist's control. Desperately performing loud, eager blowjobs, she and another female slave simultaneously service the sadist's anus and cock. Overwhelmed by dual-hole stimulation, she quickly loses control, then gets tied to a pole outdoors with a vibrator pressed against her pussy. Another female slave becomes a living cumdump, swallowing the sadist's semen, driving Keiko into jealous torment as she writhes in agony from being denied use of her own holes. Even after begging for cock with relentless blowjob worship, she's ultimately broken by humiliating infantilization and forced to wear diapers.