"Uncle" and "Niece"... From the outside, they look like just a normal relative relationship. However, the two had a secret that they could never tell the world... The two repeat secret meetings, hiding it from their families. The uncle devours the body of the young "Kokona", and Kokona becomes a submissive sex slave in order to be loved by her uncle. The two burn with passion because of their forbidden love. The uncle's pleasure is Kokona's happiness... Today, too, Kokona obediently accepts various humiliating training sessions in order to be loved by her uncle...