Serious and beautiful Japanese language teacher, Ryo. To relieve work-related stress, she secretly works a part-time job selling her body. One night, she visits a client's room only to find one of her own students waiting for her. Threatened, raped, and forced to swear allegiance as his slave, she undergoes intense anal training and humiliation, her mind and body completely dominated. Gradually, she transforms into a total sex toy, both in public and private life. The actions she takes during this transformation...