Housewife Ren visits a spa recommended by her husband, unaware that the middle-aged therapist drugs women and develops their bodies for his own use. Aphrodisiac oil and invasive massage make her sweat and grow aroused despite her protests. She convulses, pisses, squirts, rolls her eyes, and sticks out her tongue as every part of her becomes sensitive. Soon she secretly returns again and again, transformed into a shameless wife who begs for more development.