A unique couple of youkai and feminization. Once upon a time, there was a fox who demanded a sacrifice once every 100 years as a substitute for protecting those who enter the mountain and curing the disease. Miya, a young man who gave his life for the village while everyone avoided his own sacrifice. Naturally, I thought that I would be eaten up and die, but unexpectedly Miya lived in peace without being killed or eaten. Except for feminization. A body that gradually changes from a man to a woman every time he drinks fox-sama's water. If you notice it, it's just the "that" that hangs between your crotch. An unusual sexual life of youkai and human beings that is recreated from the inside of the body by a naughty guardian god.