A sweet and innocent beauty, Airi, falls into the clutches of a perverted man. Under his control, she loses her freedom and begins a life treated as nothing more than a pet. Gradually, her body is dominated, eventually transforming her into a mere cumdump. Amidst fear, new emotions begin to stir within her, warping Airi's heart with twisted desires. Her body, now enslaved by the pleasure it has come to know, moves forward on a path from which there is no return.