Misono, with her fair skin and prominent large breasts, is a part-time housewife who lives with her husband, an office worker, and his three younger brothers. One day, her husband, who is set to be promoted to manager, brings his direct superior, the general manager, over to their home. When the general manager is introduced to Misono, he can't help but be captivated by her prominent large breasts, and the next day he comes to visit her alone. Using her husband's promotion as an excuse, the general manager seeks out Misono for sex...!