"Kasumi" and her husband had a good relationship, but they didn't have much sex at night. One day, the two entertain her boss who came to return something he forgot. The husband gets drunk and falls asleep. The boss, who was captivated by her beauty and body, seduces her. Unable to forget her boss's sexual techniques, Kasumi begins to willingly let him hold her, becomes addicted to pleasure, and becomes obsessed with another man's dick.