Younger brother Kenta and younger brother Yuuki, who were entrusted to the younger brother's couple's house due to their father's work, were completely fascinated by the beautiful and glamorous appearance of their aunt, KAORI.On such a night, Kenta sees his uncle and Kaori's bondage play. Masegaki, who was interested in SM, approached his aunt skillfully while using the privileges of a child, starting with handcuffs, and finally using a rope, involving his younger brother, and making a busty married woman W Shotachi Po. I was captivated.