One day, on her way home from school, Minato, who was on the train with her friends, suddenly received a naughty selfie of a woman. Minato, who was looking at the image with his heart pounding, suddenly looked up and saw an older sister smiling at me in front of me! Minato gets off the train and asks his sister if you are the main sender of the image. Then the sister will look at the real thing to make sure? She suddenly takes off her clothes and exposes her plump breasts. Minato, who was confused at first, couldn't resist his sister's temptation and stayed as it was...!?