Who can become the uncle's daughter? A proud uncle's adopted, pure and slender sisters vie for his services. Kitaoka Karin, Shiraishi Momo, DASS-589

Sisters Tao and Guolin grew up in a wealthy family and were well-behaved. However, one day their parents suddenly died in an accident, and they were taken in by their uncle. Despite their nervousness, they encouraged each other and went to their uncle's house together. Their uncle seemed gentle, and Tao and Guolin fell asleep peacefully... However, the next day, Tao and Guolin woke up to find themselves naked and handcuffed. Their uncle arrived with a lewd smile, revealing his intense hatred for Tao and Guolin's father. He then announced that from that day forward, they would compete to provide him with sexual services to see which "daughter" truly loved him; the loser would be kicked out of the house and lose their loved ones.