The curse is actually a ritual. Every 50 years, a “Vessel” (Mai) must perform the Chichimai (乳舞 – Breast Dance) to contain the demon Kuro-Ushi (Black Bull). If the dance fails, Kuro-Ushi erupts from the Vessel’s chest and impregnates all women in the village with cow-demon hijos.
However, given the semantic components of your search, this is very likely a , possibly mis-remembered, mistranscribed, or assembled from separate tags. -D-LOVERS -Nishimaki Tohru-- Mai -Innyuuden-
Mai (舞). A shrine maiden at the village’s forbidden Inari shrine. Mai is 18 years old, quiet, but already showing stage 1 of the Milk Curse. Tohru discovers that Mai is the reincarnation of a dairy goddess who was betrayed by a feudal lord 300 years ago. The curse is actually a ritual
A fictional, isolated mountain village called Mochizuki (望月) in the late Taishō era (1920s). Western medicine and occult superstition clash. However, given the semantic components of your search,