Kanto learns that Taiichika's son has passed a highly competitive entrance exam, but later discovers that misconduct has been uncovered, putting the acceptance at risk of cancellation. Armed with this information, he attempts to bribe a school official to manipulate the boy's admission results. Though Taiichika verbally resists with firm refusal, she cannot withstand Kanto's relentless advances, and her dormant masochistic side gradually awakens. Surrendering herself to the pleasure, she ceases to exist merely as a mother, her primal female instincts increasingly aroused. Amidst intertwining power and desire, her body slowly succumbs and becomes liberated.