A brother who sees his sister as a woman... A sister who sees her brother as a man... Two people in a relationship they can't tell anyone about. Their secret physical relationship triggers a change from familial love to romantic love, and the two trapped in their forbidden affair can't escape!! Because they are family, the brother and sister with excellent physical compatibility are instinctively strongly attracted to each other. Their physical relationship and familial affair, unknown even to their parents, have become routine.
