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.

Based on erotic game by Lune TeamBitters. Nanami is happily married. While using a public bathroom, she is caught on camera by the building manager, Kamata. Using the video footage as blackmail, Kamata now has complete control over her, and Nanami soon finds herself enjoying the sexual acts she is being forced into.

Based on the erotic game by Softhouse-seal Grandee. In the near future, mankind is on the brink of extinction owing to a drastic decline in the birth rate of males. To counter the declining overall birth rate, the country has introduced a new law and the Free Sex Licence. This Licence can be presented to any woman, anytime, anywhere, and that woman is legally bound to have sex with its bearer. One night, Takumi receives one such Free Sex Licence and his life changes drastically. He has sex with Sara, a genius who’s also curious about sex, and with Misaki, elder sister of his childhood friend Rin. Rin, who’s secretly in love with Takumi, is extremely agitated by these occurrences. However, when Takumi inadvertently displays the licence in the classroom, Rin’s first time is done in public…

Based on the erotic game by Tinker Bell. Hundreds of years ago, a big war between humans and monsters happened. Humans somehow won the war and sealed up the monsters deep in the mountains…. Hayato, Chihiro and Suzuna work hard to eliminate and seal up evil monsters every day. They are actually monsters, but they just want to coexist with humans. One day, they hear that the monsters sealed up hundreds of years ago are about to come out… To stop it, they decide to visit the place…

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.

Morino Yuuko is an ordinary teacher at first sight, who owns a mansion on a hill. But she is in fact a witch. Her secret is known by Tachibana Ichirou, one of her pupils. One day he decides to pay her a visit to see her magic…

Okino Kazuki is a normal student who is happy with his staid life. There are two important girls in his life: his sister, Rinka and childhood friend Sakuragi Otome. His elder by one year, Otome is a beauty and the dream of every guy in school. Although Otome and Kazuki aren’t a couple, they hang out with each other constantly and get along very well. In fact, Kazuki believes that as long as things proceed as they currently are, the two of them will eventually be together as a couple, and even marry. However, Kazuki’s faith is shattered one day when he receives a damning DVD…

Morino Yuuko is an ordinary teacher at first sight, who owns a mansion on a hill. But she is in fact a witch. Her secret is known by Tachibana Ichirou, one of her pupils. One day he decides to pay her a visit to see her magic…