H01463 Rinkan Club Ep 4: The Dark Ceremony

In the mountain town of Rinin, the local women's college maintains a hidden society that carries out an ancient ritual. The student council president leads a secret club that orchestrates the ceremonial gang rape of a chosen woman to appease the guardian deity Hime Iwanaga. The ritual, believed to protect the region from disease and crop failure, involves a blood relative of the participants and may end with the woman being floated down the river as a sacrifice if no pregnancy occurs.