This role-play is performed by adults. Kanata, a member of the volleyball club, is fed up with her younger brother who is having fun and inviting friends over without doing anything about the house.One day, Kanata is assaulted on the buttocks by his younger brother's friend, and she feels unconscious. Not only that, Kanata's butt and whole body are trampled by her younger brother, and Kanata's frustration is directed to Max. She rushes to her younger brothers who were caught off guard and tries to have counterattack pile driving sex with her big butt!