Despite her short stature, RUI boasts G-cup breasts and finds herself alone with a man she calls "Teacher" in a rental room. As the girl aiming to become the most popular center in her group, her journey has never been easy. Determined to take on a new challenge, she decides to resort to sleeping her way to the top. At that moment, her pantyhose tears, revealing her shaved pussy—an image symbolizing the first step toward her ambitious goal.