In Tokyo's M Ward, the "Women's Psychology Research Institute" appears on the surface to be a counseling center supporting victims of domestic violence. In reality, it is a corrupt facility run by perverted instructors who exploit married women's hidden masochistic tendencies, filming the sessions to sell on the black market. Entering the center to escape the relentless sexual harassment and abuse from her obsessive doctor husband, 31-year-old Miki Ito—five years into her marriage—unexpectedly reveals a natural submissive streak. Subjected to various "training" methods such as public nudity on school routes, outdoor urination, dog-collar discipline as a female pet, and restrained vibrator torture, she initially endures it all for the sake of her marriage. But gradually, her body begins to drip with arousal, awakening to pleasures she never knew existed. This is a shocking story of her transformation.