Bakibaki File No.8 (Yuri's video). Lately, fertility-focused esthetic treatments have been gaining attention, but rumors suggest some unscrupulous estheticians falsely claim these treatments increase pregnancy chances while secretly targeting married women with malicious intent. At first, Yuri didn't suspect anything and simply agreed to receive the massage treatment. However, this massage was specifically designed to stimulate the deep, sensitive vaginal area known as the "cervix" (portio). Overwhelmed by pleasure unlike anything she'd ever experienced, her rationality quickly crumbled. Before long, she found herself accepting the man's bare penis. From that point on, Yuri became addicted to cervix stimulation sex, actively seeking out sexual encounters. The power of cervix stimulation is terrifying—now, she can't help but feel she wants to experience it just once more.