During junior high school, the girl of my first love had become a married woman. While we were filming a commemorative video together, someone played a prank and accidentally included upskirt shots. When I found myself alone with that girl, who had marital dissatisfaction, in the hallway, the bathroom, or outside the store, she got excited about being filmed and suggested, "Let's do it here and capture it," which led to me filming my fully erect penis being inserted into her.