安住 冬哉

A doctor at a nursing home of old men. He meets Atusko by chance when she knocks down Genjiro one of the old men under his care. He makes Atsuko volunteer at the nursing home to make up for her carelessness.

He makes an agreement with the Mayor to keep Atsuko as a sex slave for the old men in the nursing home.

He also runs a secret laboratory where he creates monsters that can breed with human women. They have a far greater chance to impregnate women whenever they have sex. All he needs is a few . . . "volunteers"./