A hardworking OL named Aruchan visits a massage parlor to relieve her work stress. However, she unknowingly encounters a perverted masseur who drugs her with an aphrodisiac that makes her incredibly sensitive to touch. Despite knowing it's wrong, she can't resist the irresistible urge to return again and again for more intense orgasms. She becomes addicted to the pleasure, unable to control herself or stop despite the guilt.