Shakkin Shimai  

Debt Sisters, Paid & Laid, 차금 자매, 借金姉妹

The two sisters, Kaho and Kasumi, were in a difficult financial situation and owed money to the yakuza. A student became aware of their predicament and offered to pay off their debt for a specific fee. However, there was one condition - they would have to become his sex slaves until he could verify that their debt had been settled.