Aki Okazaki is 37 years old and has been married for 11 years. She is a busy mother of two who works as a salesperson and financial planner at a major insurance company. Her tall, slender, model-like figure and the sociable personality she's honed through her sales career attract many men, but she's never had a romantic relationship. However, after giving birth to her second child, her relationship with her husband decreased dramatically, and she couldn't bear the loneliness anymore, so she accepted another man's penis. Even if she had broken the taboo once...