Aoi, a pure and beautiful college student, was living with her boyfriend, but due to various circumstances, she ended up living at her boyfriend's parents' house. At first, she lived a stable and happy life, but gradually her father's sexual desires became out of control. While her boyfriend was away, Kokoro and body were gradually violated. Her father holds a secret that she cannot tell him, and she surrenders herself to a chaotic trance-like sexual intercourse...