In the third year of their marriage, Himari, a busty wife in a slump, is secretly cheating on her husband. The affair is witnessed by Yamanaka, one of her husband's subordinates and a huge breast lover. That night, Yamanaka is invited to his boss's house for a drink, and when he sees his boss' wife Himari, he notices that her big breasts are the woman who was on a date with another man during the day and quickly becomes close to her. He then demands that Himari take various poses that make the most of her big breasts, and gradually they end up FUCKING and creampieing her...before he knows it, he has stolen Himari's big breasts from his boss!