A high school student called Ranko is attacked by a vagabond on school grounds late one afternoon. Her beloved teacher Sayuri rescues her, only to take her place as the victim. Ranko tries to get help from a piano tuner who is just leaving the school. They eventually find Sayuri and her attacker in a classroom, but the man refuses to go in and save her, saying to do so would risk her life. She is raped, and after the vagrant shoots his load and shuffles off, they clean Sayuri up and agree never to speak of what happened. Not long after the incident the piano tuner offers Sayuri a ride home from school, abducting her in the process and imprisoning her in his basement. As he subjects her to various forms of sexual torture, Ranko manages to figure out where she is being held – but risks being captured and violated herself.
Nami is a masochistic high school student who is attacked and almost raped by a gang of hoodlums before being rescued by handsome teacher Muraki. The near-miss triggers bizarre hallucinations in Nami, and she imagines herself engaged in various S&M situations with Muraki, in which she is beaten, forced to urinate, and tortured on the titular wooden horse. The hallucinations grow progressively more real (and exciting) to Nami, and soon Muraki is accused of raping her and loses his teaching position.
A look a the lives of two sex workers in Tokyo: Rei, who works as an S&M dominatrix, and Ayumi, in the more straightforward profession of call girl. In addition to their working life, the film also looks at their private lives. Rei is acting in an amateur theatre company (along with the receptionist from Ayumi’s escort service), while Ayumi is living with her student-boyfriend as he struggles to finally get accepted to college.
Ran Masaki plays a beautiful teacher who is transferred to a remote mountain school where she is gang-raped and abused by the male students. She is also turned into sex slave and subjected to sexual torture by bondage freaks.
The film tells a story about a woman and her relationship with the family of her husband’s, in particular her husband’s younger brother and father-in-law. Her husband, on the other hand, has an affair with a dominatrix and is obsessed in S&M games.
Secretary Sayo (Junko Mabuki) does some corporate snooping for her boyfriend, an upstart executive with a rival company. But she gets busted by the CEO (Akira Takahashi). Poor Sayo is captured and taken to a private torture chamber in the corporate mansion. While the secretary gets punished, the bossman’s son (Jun Nakahara) becomes infatuated with her beautiful white skin and he assumes the disciplinary responsibilities. Between the floggings, stretchings, and wooden-horse tortures he finds time to cover her body in an elaborate tattoo.
Saori is the wealthy, unfaithful wife of the impotent Kosaku. When she returns from a trip abroad, Tsumura, Kosaku’s assistant, meets her and takes Saori to an apartment. There Tsumura rapes her and submits her to various sexual tortures while she is photographed by photo-journalist Tayama. Her husband, Kosaku uses the photographs to blackmail Saori into giving him control of the family estate. Saori is returned to her mansion, but kept in a cage in the basement where she is subjected to regular bouts of abuse from Tsumura. Besides rape, other indignities endured by Lady Saori include breast bondage, enemas and the insertion of hen’s eggs into her vagina. After Kosaku dies from a stroke, Saori realizes that she has come to enjoy Tsumura’s treatment.