A neat and clean married woman, Yoriko, receives a ring from a man who claims to be a jeweler as a trial. However, Yoriko breaks the ring due to a clumsiness. Unable to resist a man who demands reparation for her, she ends up falling into a black market... In her home room with her husband, she opens her body to a paranoid guest who inserts a raw cock and pours thick semen into her virgin vagina. In a series of acts that destroy all of her ethics, Yoriko eventually gains masochism and awakens to the climax of her agony...
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