She has two casual sex partners, one of whom is a younger man, five years her junior, whom she met through work. Recently, they went on a sex trip together to a love hotel in Tochigi Prefecture. After checking in, they headed straight to the outdoor hot spring. Stripping off their underwear, they put on yukata robes, grabbed towels, and took the private elevator to the rooftop. The rooftop offered a view of distant mountains, with a rock-lined bath where one couple was already soaking. In front of the bath was a changing area with lockable storage boxes, creating a completely private space. She quickly removed her yukata, dropped her towel, and stepped in fully naked, openly exposing her breasts and pubic hair, saying, "Mind if we join you?" before entering the water. He followed her lead and got in as well. The couple already there then stood up completely naked without covering themselves. The woman’s pubic hair was neatly trimmed, while the man’s was thick and bushy like a bear’s, his penis large and erect. They boldly dried off with their towels, put on their yukata, and returned to their room. The uninhibited atmosphere unique to love hotels was stimulating for her. Watching this, he whispered, "I want to fuck now. Let’s go back to the room." Back in the room, he imagined spreading her legs wide on the bed and thrusting his cock deep into her slit, pumping vigorously. Just thinking about it turned her on too. "Yeah, let’s do it in the room," she replied. Returning to the room, they quickly stripped off their yukata and moved to the bed. Lying down, she looked at him and said, "Your cock’s totally turned on, isn’t it? Go ahead, come on." Unable to hold back, he thrust inside her and began thrusting shallowly, then deeply, eventually climaxing inside her. They repeated this cycle multiple times, frequently returning to the mixed-gender outdoor bath. Sometimes there were up to three couples, but often just one pair or nobody at all. Despite the hotel having many rooms, most couples seemed to prefer having sex indoors without visiting the rooftop. Those who did come up were likely exhibitionists. Every couple they encountered was completely nude—women with bare pubic hair, men with fully exposed erect cocks. For both of them, it was the first time seeing so many naked strangers. Perhaps because of this experience, they enjoyed countless rounds of penetration and ejaculation before checking out. A week later, still aroused by the idea of being watched, she began browsing the internet and started preparing to appear in adult videos.