Mari clashes with a man who came to her home for plumbing repairs. Enraged, the man strips her naked, violently groping her slender body before brutally forcing her into rape. After she loses consciousness, Mari's body bears the marks of his assault, with semen cruelly spilling out from repeated creampie ejaculations. Kidnapped to the man's filthy room, she is degradingly trained with lewd toys. The man gleefully watches as she writhes in agonizing orgasms, his eyes glowing with pleasure. Bound and stripped of the will to escape, Mari is made to wear perverted, man-pleasing cosplay each day, gradually transforming into a submissive female as she repeatedly accepts his cock. Her helpless form is ultimately exposed as a pitiful vessel for his endless desires.