Oujo & Onna Kishi W Dogehin Roshutsu: Chijoku no Misemono Dorei

Based on the erotic game by Pin-Point. The Kingdom of Elstein... A flourishing land with a history spanning over 1000 years. This grand nation rules over half of the continent. Noble born first princess to the Elstein royalty, Elize, loves her subjects and likewise, in return, is loved back. With Anna, her guardian knightess and childhood friend the two were living happy peaceful lives... However, Elize had a niggling worry at the back of her head. That was, that there was a discrepancy between the Elize which her citizens desired and Elize's TRUE inner self. You see, on the inside, Elize is a timid, mentally fragile girl, with a over active, anxiety inducing sense of self consciousness. This gap... between ideal and reality, naturally causes her stress and slowly but surely, the desire to show her inner self grows stronger... At first, she was satisfied with just walking around naked. But she craves for more thrill, more stimulation, more pleasure... Her desire for exhibitionist pleasures know no bounds and stirring up a storm of depravity, her best friend and the kingdom itself, is drawn into a whirlpool of salacious self destruction... A vulgar and exhibitionist themed story featuring a once pure princess, her proud knightess and unlimited levels of corruptive lewdity in a medieval fantasy setting! (Source: DLsite English)

Rinkan Gakuen: Yamete! ...Okaa-san, Minaide!

Based on the game by Lune loves K.

Rinkan Club

Based on the erotic game by Anime Lilith. The main character is a senior who attends Rinin High School; the only school among the mountain town of Rinin City. The main character, who is the student president of the high school, has another hidden persona. The persona as head of the “Gang Rape Club”... A dark ceremony existed that had been handed down for thousands of years in the old town of Rinin; the name of the ceremony, in particular, in the oldest of records. That ceremony, enacted to protect the region from disease and crop failure as a curse from the region's guardian deity, Hime Iwanaga, occurs in the evenings between the new moon and full moon, in which a maiden is disguised as Konohanasakuyabime and gangraped to appease Hime Iwanaga's anger. In regards to the maiden, there must be an important man participating in the gang rape, in other words, that man must be related in blood to their wife or lover, mother or daughter, younger sister or older sister, and the like, and after the gang rape, if a pregnancy occurs, Hime Iwanaga's anger is abated, and a good harvest and safety upon the region will be promised. However, if a pregnancy does not occur for the sake of suppressing Hime Iwanaga's anger, the maiden is supposed to be covered with semen, and floated down the river alive, as a sacrifice. And now---After the Tashio era, the ceremony itself had vanished into the dark history, but had still continued on at Rinin High School; the cruel, improper traditions being inherited over into a secret society through actions carried out by the Gang Rape Club. For generations, the student president of the High School has served as the head of the Gang Rape Club, not allowing even one day to pass uneventfully, submerging numerous women to the dark, suffocating pleasure. (Source: Visual Novel Database)

Taimanin Asagi

Based on the erotic game by Black Lilith & Anime Lilith. Asagi Igawa is a veteran Shinobu. After defeating an arch enemy a long time ago, she thought she could finally settle down. Yet, her arch enemy was revived from death through a pact made with the head demon in the city and swearing to take revenge on her by hurting those who are close to her. Her boyfriend, sister (a Shinobu) and her are part of the act being abused emotionally and... sexually... (Source: Anime News Network)

Taimanin Asagi 2

Based on the erotic game by Black Lilith & Anime Lilith. One year has passed since the Chaos Arena was destroyed, Asagi and Sakura were presently on an abandoned street on a man-made island that floated on top of Tokyo Bay. It was an enormous box-shaped island built by the government and referred to as "Tokyo Kingdom." There was hope that it would become a second city center floating at sea, but it had failed to attract businesses. The only way of getting to and from the island was through Honshu Island over the 10 kilometer Tokyo Kingdom bridge. Unfortunately, this narrow route was the means in which the inhabitants of hell found their way onto the island, luring anarchists, criminals, and even illegal immigrants there, transforming the streets of the sea bound city into a world-renowned haven for danger. However abandoned the streets were, order did exist in such a place despite it being a breeding place of crime. There was a business district at the heart as well as one of Asia's greatest prostitute grottoes. Whether or not it was only the strong who survived, the viability of living there required one not to be careless in making friends with the strong. (Source: Dark Translations)