RBD-691 — Adultery Customs Strange Tale: A Night When Someone Other Than Her Husband Raped Her Hibiki Otsuki

What will become of Hibiki, a young wife who moves to Kizuki village, where there is an evil custom in which the genitals of the most beautiful woman in the village are enshrined as a mortar, and the men who worship it, using their penises as pestles, pound the mortar every night until the village is saved from disaster?