Chigusa, who has been married to her husband Kenji for a year, is living happily. One day, just before her wedding anniversary, her husband asks her to let her live in to find a new job. Furthermore, she decided to go on a business trip and on her wedding anniversary, her husband ends up spending time with her brother-in-law while she is away. After seeing her husband off, she thought she had gotten alongside her friendly brother-in-law, but was pushed down by Kazuhiko, who was lustful by Chigusa's defenseless appearance. Since that day, the pleasure etched into my body has repeatedly passed my head...