In a garbage room, a female student is imprisoned, and random objects that have rolled down the wall are inserted into her vagina as part of a cruel form of discipline! In an endless cycle of insertion of foreign objects, alternating between pain and pleasure, the female student, who initially wanted something inserted into her vagina, gradually becomes submissive. "I'll go crazy if nothing's inserted..." Have you ever seen the expression on a woman's face when a wooden stick is inserted?