Amakawa Noboru heads to the village hot spring to soothe his fatigue from nonstop baby-making. However, when he opens the door, he finds a sea of ​​demon girls waiting for him. All of the water there is natural breast milk hot spring water from the demon girls. The effects of the breast milk make his whole body hot, and he becomes dominated by the breasts. Noboru stops thinking and decides to suck all the breasts in the village.