They're Beastwomen Meat Toilets ~Tanezuke Infinite Loop~

Due to a pandemic, the world's population has significantly decreased. Fearing the extinction of humanity, a plan is devised to forcibly impregnate women and increase childbirth. In order to quickly increase the population by producing a large number of children, research is conducted to combine humans and animals, creating "beastmen." This is known as the "Beastification Project."​