Centuries ago, the founder of the venerable Tatsumiya house received an elven slave from the first Westerners that made shore in Japan. Ever since, the beautiful long-lived Ainalinde was the symbol of power of the Tatsumiya clan, with the head of every generation keeping her as a concubine. In modern times, her libido outgrew the position of a concubine, so she "tends" to every male in the extended Tatsumiya family. And none of them notice that the nearly immortal elven beauty is playing them like a fiddle and weaving a plot centuries in the making...