Chigusa, who has been married to her husband Kenji for a year, is living happily ever after. One day, just before her wedding anniversary, her husband asks her brother, Kazuhiko, to stay in order to find a new job for her. In addition, her business trip was decided, and on her wedding anniversary, her husband was away and she ended up spending it with her brother-in-law. After seeing her husband off, she thought she was open with her friendly brother-in-law, but she was pushed down by Kazuhiko, who was lustful at Chigusa's defenseless appearance. From that day onwards, the pleasure that was engraved into her body repeatedly crossed her mind...
