Widow Reika Saijo, grieving the loss of her beloved spouse, puts on a brave face to avoid worrying others. Her shapely, voluptuous backside continually draws the lustful gaze of her brother-in-law, who leers at her without restraint. Unaware of his dangerous intentions, Reika is one day caught pleasuring herself in private—witnessed by her brother-in-law. He then forcefully overpowers her, dominating and violating her exquisite body at will. To make matters worse, his son—her own nephew—stumbles upon the shameful act, exposing the family's darkest secret.