Rinrin, who married a man with a stepson and spent happy times together. Her husband was cooperative with her attempts to get pregnant, but due to his age, he had become quite indifferent, and she secretly felt unsatisfied with their physical relationship. Around that time, her husband went on a long business trip, leaving Rinrin to live with her stepson Yuusuke alone... It was around then that his behavior started to seem strange. As the distance between them shortened and their physical contact increased, Rinrin found herself both confused and unable to stop it. And their physical interactions became increasingly bold…
