Sisters Ran and Hikaru, who lost their mother, were living with their father who ran an inn. However, due to the hardships, their father ended up hospitalized. The elder sister decided that they would manage on their own. But the customers who arrived were the creditors from whom their father had borrowed money for the business. They set their sights on the sisters and deceived the younger sister Hikaru, taking advantage of her body… They showed Ran, the elder sister, the recorded footage, using it to blackmail them. Eventually, they captured both the hearts and bodies of the sisters, subjecting them to continuous internal ejaculation training that would inevitably lead to pregnancy.
