Rinkan Kurabu

In the isolated mountain town of Rinin, the protagonist attends the only high school, Rinin High School. By day, he is the student council president, but by night, he leads the secret 'Gang Rape Club.' This club perpetuates a dark ritual passed down for millennia—a ceremony to appease the guardian deity Hime Iwanaga, where a maiden is disguised as the goddess Konohanasakuyabime and gang-raped between the new and full moons. If no pregnancy results, she is covered in semen and floated down the river as a sacrifice. After the Taisho era, the ritual faded from public view but continued clandestinely at the school, with successive student presidents upholding this cruel tradition, drowning countless women in dark, suffocating pleasure.