An uncontrollable exhibitionist nymphomaniac, Ka-yo, is in a state of constant excitement all day long during a long-awaited trip filled with intense sex and infidelity, complete with public exposure. In the outdoor hot spring, she masturbates with her fingers, showing no chance for her vagina to dry, and as soon as she enters the room, she clings to his penis, demanding unprotected sex without worrying about the possibility of getting pregnant. In the morning, she squeezes semen from his erect penis, and after years, she is thrilled by outdoor exposure, climaxing and ejaculating repeatedly.