A year has passed since the death of her husband, and widow Hinami struggles to survive, crushed by loneliness and despair. One day, her late husband's younger brother, Hiroshi, comes to stay overnight while on a business trip. Hiroshi has long desired Hinami's voluptuous, mature, and sensual body, and knowing she lives alone, he becomes aware she has been secretly relieving her sexual frustration. Late one night, he takes bold action. Though Hinami initially resists, her heart wavers as Hiroshi's rock-hard cock penetrates her body, and she ultimately succumbs to a creampie. Afterward, Hiroshi secretly allies with other relatives also vying for the inheritance. They drug Hinami with aphrodisiacs, weakening her body, and to make her a new vessel for the estate, they proceed to gang rape her ripe, mature pussy with their cocks one after another, impregnating her. Through this ordeal, Hinami is consumed by Hiroshi's overwhelming desire—stronger than her late husband's—and her body and mind are gradually, completely liberated to their very limits.