Our sisters were brainwashed and became father-in-law sex toys ... 2 - Kotone Fuyue

This movie features a taboo incest theme where the father uses his daughters as sex toys. The daughters, particularly Qin Yin, are extremely devoted to their father and prioritize pleasing him above all else. As the story progresses, the father engages in explicit sexual activities with his daughters, showcasing a disturbing and intense familial relationship. The central kink revolves around the father-daughter incestuous dynamic, exploring the complexities and depths of their twisted bond.