This time, "Rumi-san" takes on a special project pursuing deeper masochism, inspired by her favorite book, "The Story of O." Over the course of two days, she is passed from man to man, continuously tormented and used—a grueling, extreme experience. Within the "Tuning Club," a "slave room" where men await their turn, Rumi's ordeal begins tonight. The first day of this five-hour marathon sees her penetrated and dominated by over a dozen men, plunging into a unique world of pleasure and pain.