The third installment of the hardcore affair drama series! The lead is Hibiki Otsuki. Her partner is Kazuki Suzuki. Hibiki moved to Tokyo from the countryside with the expectation of getting married. She was living a happy married life with her salaryman husband, without any inconvenience, although it was modest. One day, she reunites with Kazumi and Yuichi, her high school friends who are now married and a couple. Although they were attracted to each other, Hibiki and Yuichi couldn't confess their feelings. Knowing it was wrong, they continued to meet secretly...
