Long ago, in a faraway land, the Voimakai and the Galecea have developed a symbiotic social structure based on their mutual need for each other's bodies. Young Galecean women are bonded to the households of the Voimakai, providing them with the precious milk of their breasts. In turn, Voimakan husbands must sire the Galecean children. And all of it takes place under the gaze of the powerful Lady of the House.