Jyu-Rin ~Kanraku no Kakutou Shimai~

The sisters were skilled fighters, honing their skills to avenge their father's enemies. However, during the battle, the older sister was caught off guard for a moment, while the younger sister fell into a despicable trap. They were both captured and awaiting them was a storm of training to become female slaves...
The sisters, with their noble spirits, tried desperately to resist the onslaught of pleasure hell, but their mental strength was gradually eroded by pleasure...

[Translated from DMM]