Yua Mikami is an engaged girl and is currently living with her future husband. One day, she went to a class reunion with her high school friends. There, she met her ex-lover of three years, who is now a successful businessman. She was raped and fucked by her ex-lover. In the days that followed, he always found a way to fuck her. Even though she was cuckolded, her fiancé still didn't know anything and still had feelings for her. Until one day, he decided to propose and received a letter from his lover...