Beautiful Sisters Meat Slave

27-year-old female dentist Reiko Yumigaoka and her 21-year-old assistant sister Kyoko run this dental clinic in an apartment. One day a robber broke into the clinic, and her sister Reiko was asked to borrow money, while her sister Kyoko was stripped naked and held hostage in the clinic. Reiko's teacher Zhengmu agreed to lend money, but the condition was Reiko's body. When her sister Kyoko and her sister Reiko were on the phone, they heard Masaki violating her sister from behind, and she gradually moaned. And the strange robber on the other side of the phone, listening to the moans on the phone, couldn't help but touch his sister Kyoko...