A woman who has fallen for her younger brother confesses her love to him in their first sibling bath in 10 years! "I can only see my brother as a man...", "I've liked my brother since I was a child...", "I masturbate with my brother as a sex toy...". The beautiful older sister and her virgin younger brother engage in a forbidden incestuous act. The film captures every moment of the older sister Ayame's seduction and the younger brother's confusion.