Yui, a young wife who is dissatisfied with her daily sex life, masturbates while looking at the body of her neighbor, a cram school student. Then, unable to hold her urge to pee while shopping, she pulls down her skirt in an alleyway and is found by her landlord, who then rapes her. However, she awakens to the pleasure of being held by a man other than her husband, and begins to seduce men at the company where she is dispatched, becoming engulfed in a whirlpool of pleasure...