Released as OVA, the series consists of eleven mainly unrelated episodes referred to as operations and is most noted for its very extreme sexual content, most of which center on BDSM and similar fetish themes as well as its high production values (compared to other hentai titles of the time).
Finding herself transformed and liberated by the experience, Ai embraces the lifestyle, and enters into a passionate relationship with an equally uninhibited young man she is drawn to.
With a subtle BDSM premise, a teenage couple has sex in what seems to be a closed public bath house at night in the middle of winter.
A reluctant girl is fondled, has her bathing suit cut off to expose her erogenous zones, and is coerced into performing various sex acts by her unnamed male partner.
The episode begins when a young blue-haired woman is shown having sex with a group of strange men, afterwards they throw her into an oubliette where she then emerges as a butterfly.
Based on a visual novel, the story begins when an ordinary girl named Marino Okura (a virgin) is being chased by two young men who are revealed to be human traffickers.
This episode is a continuation of Operation 05, and takes place during a sex party commemorating the anniversary of Saki's master's death.
He has been investigating the distribution of an illegal drug, called "Yellow Star"[nb 2], which is a mild hallucinogen, paralyzing agent, and extraordinary aphrodisiac.
It becomes apparent that the detective is buying a steady supply of the illegal drug as part of a long-term strategy to sexually abuse Ayana.
Following a promise to Kohei that she will allow him to take her virginity after their exams are completed, the detective traps her in his basement, secretly drugs her with Yellow Star and proceeds to rape her.
The ensuing days detail the escalation of the abuse as Ayana herself becomes addicted to both Yellow Star and her new stepfather's increasingly violent sexual fantasies.
Aroused by both the drug and their violence, Ayana responds to their perverse demands with a level of sexual dexterity hitherto unrealised by the youngster.
As a powerful aphrodisiac, Yellow Star heightens Ayana's own sexual appetite and the prolonged 'rape' ends with all three ejaculating inside her.
The two men who kidnapped her are revealed to be the original shadowy well-endowed distributors of "yellow star" and force her into another abusive encounter with them.
In a scene cut from the original, the two Yellow Star manufacturers are shown to be demanding to engage in sexual activity with Ayana as their price for access to the drug.
Maya is transported to another world, where she meets two lizard-like creatures who use trickery to convince her to take all of her clothes off where she is sold into slavery to Lord Estilgar, and used in experiments to turn her into a sex slave.
About this time, two members from one of the human factions are sent to investigate the power that was unleashed by Maya, citing a prophecy of a warrior long held in their culture.
Meanwhile, the dominatrix implants a parasitic alien mass into Maya's uterus through her mechanically stretched vagina to lower her inhibitions and forces her to copulate with Leyna.
Masaki Hoshino, a writer for a magazine publishing company is traveling on a train to go on a trip, while dreaming about having sex with a woman he has never met named Miyuki.
It turns out that AngelPro also works in the flesh peddling business, and under the guise of giving her a "new image", they begin to train Rina through public humiliation scenarios and outfits.
The final shot shows the all-male audience rushing towards the stage and crowding around her as she smiles vacantly, with a tear streaming down her cheek.